60 topographic sheets and 14 fire insurance atlases across 2 places.
This curated hub for Seneca County, Ohio brings together the page's documented record links, visible map or image evidence where published, and routes to related local records.
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35 National Register listings · 35 businesses named in the fire insurance atlases from 1887 to 1938 · the 1886 county history tells 2 stories and names 481 people · people the book names include Rev. Elias B. Van Arsdale (Seneca Township, 1896) (machine-read).
Sources: the county history on the Internet Archive · the National Register database, National Park Service
A captivity, a drowning, a famine, a man scalped clearing his lot in 1789. These are passages from History of Seneca County, Ohio, Containing a History of the County, Its Townships, Towns, Villages ... Portraits of Early Settlers and Prominent Men; Biographies; History of the Northwest Territory; History of Ohio; Statistical and Miscellaneous Matter, Etc., Etc, written while people who remembered the events were still alive, and each one opens the section it comes from.
While Gen. Harrison was at Camp Seneca, he narrowly escaped being murdered by an Indian. It appears that the friendly Indians of the Delaware, Shawanese, and Seneca tribes had been invited to join him. A number had accepted the invitation, and had reached Seneca before the arrival of the Kentucky troops.
" He dreamed he was fleeing from an enemy - it was, he supposed, something supernatural^ perhaps an evil spirit ; that after it had pursued him a long time, and for a great distance, and every effort to escape from it seemed impossible, as it was now just at his heels, and he almost exhausted ; at this perilous time he saw a large water, to which he made with all his remaining strength, and at the very instant when he expected each bound to be his last, he beheld, to his joy, a caiioe, near ihe shore ; this appeared as his last hope ; breathless, and faint, he threw himself into it, and that moment, of its own accord^ quick as an arrow from the bow, it shot from the shore leaving his pursuer on the beach."
Taken for the Office of War Information and the Farm Security Administration, who photographed the country between 1935 and 1944. Works of United States government photographers, with no known restriction on use. Each opens its catalogue record.
Every property in this county listed on the National Register of Historic Places, with the year it was listed and the federal nomination document.
| Photograph | Property | Type | Listed | Reference |
|---|---|---|---|---|
 | Aigler Alumni Building | building | 1979 | 79002779 |
 | Bagby--Hossler House | building | 1986 | 86001562 |
| Beatty Glass Company | building | 1980 | 80003217 | |
| Black Student Union Center | building | 1979 | 79002780 | |
 | Bowman's Distillery | building | 1980 | 80003218 |
 | College Hall | building | 1979 | 79002778 |
 | Cory, Ambrose, House | building | 1979 | 79001942 |
| Fine Arts Building | building | 1979 | 79002770 | |
 | Founders Hall, Heidelberg College | building | 1973 | 73001534 |
 | France Hall | building | 1979 | 79002776 |
 | Gerhart-Rust Residence | building | 1979 | 79002766 |
 | Great Hall | building | 1979 | 79002777 |
| Hanson Machinery Company | building | 1980 | 80003219 | |
 | Hedges-Hunter-Keller-Bacon Gristmill | building | 1980 | 80003220 |
| Henny Barn | building | 1979 | 79003646 | |
 | Hunter, William, House | building | 1980 | 80003221 |
 | Laird Hall | building | 1979 | 79002775 |
 | Miami Street Grade School | building | 1979 | 79001945 |
 | Mueller Brewery | building | 1980 | 80003222 |
 | Mueller, Christ, House | building | 1980 | 80003223 |
 | National Home, Daughters of America | building | 2003 | 02001730 |
 | Octagon, The | building | 1979 | 79002764 |
 | Ohio Lantern Company | building | 1980 | 80003226 |
 | Omar Chapel | building | 1987 | 87001982 |
 | Pfleiderer Center for Religion and the Humanities | building | 1979 | 79002773 |
 | Pleasant Ridge United Methodist Church and Cemetery | building | 1993 | 93000880 |
 | President's House | building | 1979 | 79002768 |
| Social Science House | building | 1979 | 79002782 | |
 | Springdale | building | 1993 | 93000878 |
| Tiffin Agricultural Works | building | 1980 | 80003227 | |
| Tiffin Art Metal Company | building | 1980 | 80003228 | |
 | Tiffin Waterworks | building | 1980 | 80003229 |
| Wagner Brothers Bottling Works | building | 1980 | 80003230 | |
 | Webster Manufacturing | building | 1980 | 80003231 |
 | Williard Hall | building | 1979 | 79002771 |
Seneca County holds 0 covered bridges on the National Register, more than any other property type here. Each is a listed structure with a federal nomination on file.
Sampled issues, machine-read from the Library of Congress scan and published page by page, so every headline and column is searchable text.
Tiffin, Ohio, 1848 to 1859. Machine-read from the Library of Congress scan.
Tiffin, Ohio, 1859 to 1868. Machine-read from the Library of Congress scan.
Tiffin, Ohio, 1868 to 1887. Machine-read from the Library of Congress scan.
Drawn when these were printed as single large sheets: the town seen from the air, and the county divided into its farms with every owner named. Each opens the original at the Library of Congress.
Selected from the Digital Public Library of America's 13 image records catalogued for this county. Every one shown here carries a public-domain status or a licence that permits reuse on a site that carries advertising; non-commercial, share-alike and restricted images are excluded. The selection is spread across the county's towns (at most eight per town), so no single institution's bulk upload crowds out the rest. Each opens the holding library's record, and the complete set at the Digital Public Library of America is one click away.
Flown by the U.S. Geological Survey between 1937 and 1989, the Aerial Photo Single Frames collection is the definitive mid-century view of the land: fields, roads and rivers as the camera saw them. 909 frames touch this county; the selection below spreads across the decades of flights (at most four per year), so one flight cannot crowd out the rest. The full set is free to browse and download at EarthExplorer under the dataset Aerial Photo Single Frames.
The "who lived here, by year" answer: pre-1929 public-domain directory volumes naming the county's people, machine-read and searchable as text.
The thermometers that kept this county's weather, and the gages that watched its rivers, as the federal records hold them. The extremes below are measured values from those records, not estimates.
Who lived here in 1950, one enumeration district at a time, as the Census Bureau described each district. Each row opens its official National Archives result, with Population Schedules and ED Maps available there.
Every Sanborn volume opens with a printed index naming the town's mills, tanneries, hotels and works by proprietor. Those indexes were read off the scanned sheets by machine and then matched to each other, so a business surveyed four times appears here once, with the years it survived. 5 of these 35 were named in more than one atlas. Each carries a crop of the line it was read from: the spelling is the recogniser's and the 1880s lithographer's, and the scan behind it is the proof.
Works
1914 to 1914, named in 2 atlases
Read elsewhere as Vagner Bros., Bottling Works.
Saw Mill
1887 to 1891, named in 2 atlases
Read elsewhere as Martin, D.,Saw Mill.
Carriage Shop
1887 to 1901, named in 2 atlases
Read elsewhere as Tannest, P., Sons, Carriage Shop.
Church
named once, in the 1887 atlas
Appears in 1887
On the National Register as Pleasant Ridge United Methodist Church and Cemetery
The NOAA Storm Events Database holds 464 reports for this county, causing 7 deaths, 37 injuries and about $31,150,850 in recorded property damage. Each settlement page carries the reports that name it.
| Kind of event | Reports |
|---|---|
| Thunderstorm Wind | 248 |
| Hail | 159 |
| Tornado | 23 |
| Flash Flood | 23 |
| Flood | 5 |
| Lightning | 2 |
| Heavy Rain | 1 |
| Winter Weather | 1 |
| Funnel Cloud | 1 |
| High Wind | 1 |
The most serious of them, by death, then injury, then recorded damage. The accounts are quoted exactly as the forecast office filed them.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| April 1965 | Tornado (F3) | not stated | 4 killed, 30 hurt, $250,000 | no account filed |
| November 2002 | Tornado (F3) | Tiffin | 1 killed, 2 hurt, $12,800,000 | An F1 tornado touched down southwest of Tiffin near the Seneca County Airport. The tornado moved east northeast and strengthened to F3 intesity as it crossed U.S. Highway 224 and moved into Tiffin. The Honey Creek subdivision along County Road 19 near US 224 was hard hit. Six homes on Nantucket Drive in the subdivision were destroyed and many other homes damaged. As the tornado continued across the southern part of Tiffin it leveled a business along State Route 231 and destroyed several homes on Siesta Drive just east of State Route 231. A retirement community along St. Francis Avenue and just north of Siesta Drive was also hard hit by the tornado. Eight homes in the community were destroyed with five more damaged enough to be declared uninhabitable. Another 25 homes sustained lesser amounts of damage and several cars were found lying upside down. The tornado weakened to F2 intensity as it crossed State Route 100 and moved over Greenlawn Cemetary. From the cemetary, the tornado began to move in more of a northeasterly direction and briefly weakened to F1 intensity as it passed to the east of Heidelburg College. The tornado reintensified to F2 as it crossed State Route 18 and continued northeast across open country where it damaged many more homes and buildings. The tornado reached strong F3 intensity for several miles to the northwest and north of Republic. A 24 year old male was killed and two other people seriously injured when a home in Scipio Township on County Road 38 near County Road 43 was swept off of it's foundation. Two other homes nearby were also leveled. The tornado remained on the ground for another ten miles and gradually weakened to F2 intensity. It finally lifted south of State Route 18 near Fireside. Later, the same parent thunderstorm spawned another tornado a few miles away in Huron County. Overall, this tornado destroyed 32 homes and businesses, heavily damaged another eight and slightly damaged around 70 homes in Seneca County. Dozens of cars were also damaged and destroyed with downed trees and power poles numbering in the hundreds. The damage path from this tornado was roughly 21 miles in length and over 200 yards in width at times. |
| May 1973 | Tornado (F3) | not stated | 1 killed, $2,500,000 | no account filed |
| December 2013 | Flood | Tiffin Arpt | 1 killed, $5,000 | The Sandusky River at Tiffin came out of its banks after a heavy rain event on the 21st and 22nd. The river 11.11 feet, 0.61 feet above moderate flood stage. Flooding impacted Route 53 north of U.S. 224. Floodwaters also inundated Township Road 131. In the city of Tiffin, Water Street, Marlyn Street, Front Street, and Davis Street were inundated. There was one fatality on Maryln Street due to the flooding. |
| January 1998 | Winter Weather | Countywide | 2 hurt | no account filed |
| June 1991 | Thunderstorm Wind | not stated | 2 hurt | no account filed |
| July 1999 | Lightning | Tiffin | 1 hurt | A 20 year old male was struck by lightning while golfing. The man was treated at a local hospital for minor injuries. |
| February 2011 | Flash Flood | Tiffin | $1,500,000 | Portions of the Heidelberg University campus in Tiffin and the local YMCA were flooded as Rock Creek came out of it's banks. Waist deep water was reported in the Clinton Mobile Home park. The Riverbend Apartments experienced flooding in the lower-level apartments. At least 30 vehicles were damaged by flooding on the Heidelberg campus. Two drivers were rescued from submerged vehicles on county road 16 in Bloomville. One rescue occurred at US 224 just east of county road 17. Additional water rescues occurred at SR 19, CR 16, and TR 218. |
| August 2007 | Flood | Bettsville | $1,500,000 | Heavy thunderstorm rains fell on Seneca County on August 19th through the 21st. Widespread flooding occurred across the county with the worst conditions reported in northern Seneca County. A spotter in the northwestern corner of the county reported 6.30 inches of rain between 8 am on the 19th and 3 pm on the 20th. A Cooperative Observer in Tiffin measured a three day total of 4.45 inches. Significant flooding occurred along all of the major rivers and steams in the county. The Sandusky River left it's banks in Tiffin and flooded portions of 5th and 6th Avenues. Many homes on these streets were damaged by flooding. Wolf Creek left it's bank near Bettsville and caused a lot of damage. At least two homes in the town had to be evacuated because of flooding. State Route 12 had to be closed because of flood waters up to three feet deep. On the 21st, a nursing home north of McCutchenville had to be partially evacuated because of rising flood waters. During this event, one home was damaged enough by the flooding to be declared destroyed with another seven homes damaged enough to be uninhabitable. Hundreds of additional homes in the county sustained lesser amounts of damage, mainly from basement flooding. Dozens of streets and highways in the county had to be closed because of flooding. Erosion and standing water caused considerable damage to agricultural interests in the county. |
| November 2002 | Tornado (F1) | Fostoria | $1,100,000 | After lifting in downtown Fostoria (near the Hancock County border) the tornado touched down again on the northeastern edge of Fostoria. The tornado moved northeast from this location and damaged several homes before reaching the Fostoria Airport where a hanger and office building were damaged. From the airport, the tornado continued northeast across open farmland for a few miles and finally dissipated northwest of Amsden near the intersection of County Road 3 and Township Road 172. Several more homes and barns were damaged along the last half of the tornado track. Many cars were also damaged and hundreds of trees and power poles toppled. The damage path from this tornado in Seneca County was roughly five and a half miles in length and around 25 yards in width. |
| July 2013 | Thunderstorm Wind | Fostoria | $800,000 | A line of thunderstorms producing winds estimated to be around 70 mph raced east across Seneca County causing widespread damage. Hundreds of trees were snapped or toppled. A lot of damage to homes and buildings was also observed. Most of this damage was from lost roofing or siding but some outbuildings were also flattened. A lot of tree damage was reported on the south side of Fostoria. A line of 15 utility poles was knocked down northeast of Republic. The damage was especially heavy in the northeast corner of the county from Reedtown north to Flat Rock. A lot of downed trees were also reported in the Attica area. Several vehicles were reported damaged in the county. Power outages were reported throughout the county. It took several days for power to be fully restored, especially across the northeast corner of the county. Many roads had to be closed because of downed trees and power lines. |
| May 2008 | Tornado (EF1) | Fostoria Snyder Arpt | $750,000 | An EF1 tornado continued into western Seneca County from Hancock County. The tornado entered the county on the south side of Fostoria and continued northeast for around two and half miles before dissipating near County Road 60. One home on the south side of Fostoria was damaged enough to be classified as destroyed. Many other homes in the city sustained roof or siding damage. At least 30 homes were reported to have limbs or trees on them in Fostoria alone. Several sheds and other outbuildings were also leveled. Hundreds of trees were toppled as well. This tornado had a damage path more than eight miles in length and up to a 100 yards in width. |
| November 2017 | Thunderstorm Wind | Tiffin Seneca Co Arp | $500,000 | Thunderstorm downburst winds estimated to be as much as 70 mph caused considerable damage on the south side of Tiffin and also across Seneca and Eden Townships to the south of the city. Hundreds of trees and large limbs were downed across the area along with many utility poles. In Tiffin, homes were reported damaged on Melmore Street, Mohawk Street, Longfellow Drive and Coe Streets. 55 trees were toppled or uprooted in Greenlawn Cemetary on the southeast side of Tiffin. Several barns were damaged in Seneca and Eden Townships. The damage was most concentrated along County Road 19 and Township Road 159 south of Melmore. Several roads and streets were blocked by fallen trees and widespread power outages were reported throughout the Tiffin area. |
| July 2003 | Thunderstorm Wind | Countywide | $500,000 | A line of severe thunderstorms moved across Seneca County and caused extensive damage. A 69 mph gust was measured in Tiffin at 3:51 a.m. Over 100 trees and at least ten power poles were downed in the county. Several homes were damaged across the county and a barn was leveled on County Road 39. Several buildings were also damaged at the county fairgrounds and a truck was blown over on State Route 4 near Attica. Many vehicles were damaged or destroyed by fallen trees and limbs. |
| June 2006 | Flash Flood | West Portion | $450,000 | Thunderstorms dumped 1 to 2 inches of rainfall on the western half of Seneca County during the evening hours of the 21st on ground already saturated from flooding earlier in the day. Cooperative observers in Tiffin measured 3.33 inches of rain on the 21st with 2.39 inches measured by spotters in the eastern portion of county. Widespread lowland and urban flooding occurred as streams and creeks quickly left their banks. The street flooding was especially bad in Fostoria where an underpass was flooded by more than four feet of water. Numerous other roads and streets were also closed because of flooding. Dozens of homes sustained damage from basement and nuisance flooding. Crop losses because of flooding were also substantial. |
| May 2004 | Flash Flood | Countywide | $400,000 | Thunderstorms dumped between two and three inches of rain on Seneca County during the early morning hours of May 21st. A cooperative observer in Tiffin measured 2.36 inches of rain. This rainfall combined with ground already saturated from heavy rains the previous few days led to widespread flooding. Several roads in the county were either washed out or flooded. Many homes sustained flood damage. |
| November 2017 | Thunderstorm Wind | Ink | $350,000 | Thunderstorm downburst winds estimated at 70 mph caused damage along State Route 18 from about two miles west of Republic to Republic. Nearly every property along State Route 18 from Schubert Road to County Road 43 sustained damage. Several homes had roof damage and a couple barns lost entire roofs. A semi trailer was overturned and many trees were toppled or uprooted. Part of a unharvested corn field was flattened. Several homes in the town of Republic also sustained roof damage. The damage also continued east of Republic along State Route 162. A couple barns were heavily damaged and a couple dozen trees toppled. Damage was also reported just to the south along Township Road 8 which runs parallel to State Routes 18 and 162. Scattered power outages were reported throughout the Republic area. |
| June 2012 | Thunderstorm Wind | Springville | $300,000 | An intense line of thunderstorms or Derecho moved across the southern end of Seneca County during the afternoon of June 29th causing some damage. A wind sensor near Tiffin measured a 65 mph wind gust. The Springville area in southwestern Seneca County was especially hard hit with dozens of trees knocked down. A few homes and buildings lost roofing or siding. Scattered power outages were reported. |
| August 2022 | Flash Flood | Fostoria | $250,000 | Fostoria Police and Fire reported flash flooding across the southern half of Fostoria. All underpasses in the city were impassable with up to 5 feet of water over the roadways. Most streets on the south side of Fostoria were flooded with an average of 2 feet of water depth. Several reports of vehicles stranded in flood waters with up to 3 feet of water depth. Reports of numerous basements flooded. Trained spotter measured 3.05 inches of rain in around an hour period between 1300 LST to 1400 LST. Radar estimates of 2.5 to 3 inches of rain fell in this one hour period across Fostoria, with a peak recurrence interval of 50 years where the heaviest rain fell. Peak instantaneous rainfall rates of 3.5 inches per hour were estimated by radar. |
| July 2019 | Thunderstorm Wind | Cooper | $250,000 | There was damage to the roof and structure of a large barn. At least one silo was destroyed and one silo was damaged. A large tree branch was blown onto a house. There were numerous trees reported blown down. Most of the damage reports were along East Township 138. |
| November 2017 | Thunderstorm Wind | Bascom | $250,000 | Thunderstorm winds estimated at 70 mph destroyed three barns and heavily damaged two more along State Route 635 north of Bascom. A home nearby also sustained some damage. |
| October 2013 | Thunderstorm Wind | New Riegel | $250,000 | Thunderstorm wind gusts estimated to be as least 60 mph caused considerable damage in and around Tiffin. A mobile home was knocked off of its foundation west of Tiffin and barn was heavily damaged east of the city. At least 10 utility poles were toppled on the south side of Tiffin causing widespread power outages. Dozens of trees and large limbs were downed. |
| July 1992 | Tornado (F2) | not stated | $250,000 | no account filed |
| May 1991 | Tornado (F1) | not stated | $250,000 | no account filed |
| June 1989 | Tornado (F0) | not stated | $250,000 | no account filed |
| November 1965 | Tornado (F2) | not stated | $250,000 | no account filed |
| February 1961 | Tornado (F2) | not stated | $250,000 | no account filed |
| November 2017 | Tornado (EF1) | West Lodi | $200,000 | A weak tornado touched down along Township Road 100 in West Lodi. The location is about 100 yards west of County Road 27. Two storage sheds near the initial touchdown were destroyed and their contents thrown across the area. Debris from the sheds peppered the two houses associated with the sheds. Both homes had projectiles from the sheds sticking out of three of their four sides. Both houses also sustained major roof damage and were shifted off of their foundations. The tornado then continued northeast across County Road 27 and strengthened to EF1 intensity. A couple homes on the east side of Country Road 27 had windows blown out and suffered roof damage. Many trees in the area were also snapped or uprooted. The tornado then continued northeast across farm land before lifting as it approached Township Road 134. Portions of a corn field were flattened by the tornado. The damage path was just under a half mile in width and over 150 yards in width at time. |
| May 2011 | Hail | Alvada | $200,000 | A line of thunderstorms produced a large swath of hail ranging in size from peas to golf balls. Numerous vehicles and homes were damaged during this event. |
| November 2017 | Tornado (EF2) | Cooper | $150,000 | A weak tornado touched downed in a field in rural Adams Township. The initial touchdown occurred east of County Road 21 about half way between Township Road 138 and County Road 38. A few trees were snapped or uprooted near the initial touchdown. The tornado then continued east as it rapidly strengthened to EF2 intensity. The tornado leveled a large barn as it approached State Route 18. Debris from the barn was found scattered across a large area including wrapped around utility poles and trees. The tornado crossed State Route 18 and lifted before reaching Township Road 183. This tornado was on the ground for just over a half mile. |
| July 2013 | Tornado (EF0) | West Lodi | $150,000 | A weak EF1 tornado touched down in rural Reed Township near the intersection of County Road 27 and Township Road 122. The tornado continued intermittently on the ground for about six miles before crossing into Huron County. Damage along the damage path consisted mainly of downed trees, although some structures did sustain significant damage. Several barns lost sections of roofing. One home near the initial touchdown had a second story wall partially collapse. The attached garage on one home lost its garage door and was lifted from its foundation. There was also evidence of extensive straight wind damage along the path. Crop damage, especially to corn, was significant. |
| May 2005 | Thunderstorm Wind | Tiffin | $150,000 | Thunderstorms winds blew several containers off of a moving train five miles west of Tiffin. |
| April 2003 | Thunderstorm Wind | Fostoria | $150,000 | Thunderstorm winds downed many trees and large limbs in Tiffin and at least two large limbs in Fostoria. A couple homes in Tiffin sustained roof damage. A few cars were also damaged by fallen trees and limbs. 1,600 customers lost power in Tiffin alone. |
| November 2017 | Thunderstorm Wind | Weiker Arpt | $125,000 | Thunderstorm wind gust estimated at 70 mph damaged the roof of a home along State Route 101 near Weiker Airport in northern Seneca County. Two barns nearby were also heavily damaged. |
| June 1999 | Thunderstorm Wind | Countywide | $125,000 | Trees and large limbs down countywide. Two cars were damaged by falling trees at Kansas. A grain elevator was blown across the road near the intersection of CR 31 and CR 42. In Maple Grove, a garage roof was torn off with moderate damage done to the adjacent house. A nearby concrete block barn was also destroyed. |
| June 2013 | Thunderstorm Wind | Amsden | $100,000 | Thunderstorm winds downed dozens of trees across northern Seneca County. Scattered power outages were reported. |
| July 2011 | Flash Flood | Tiffin | $100,000 | Over six inches of rain fell over Tiffin during the overnight hours. This resulted in numerous road closures, abandoned cars, and the evacuation of the Clinton Estates mobile home park. The YMCA building was flooded with significant damage. Most roads around Tiffin were closed for several hours. |
| May 2011 | Hail | Fostoria | $100,000 | Hail from penny to golf ball sized was reported. Many vehicles and a few homes were damage by the hail. |
| April 2007 | Thunderstorm Wind | Tiffin | $100,000 | Thunderstorm downburst winds downed a dozen power poles along County Road 48 west of Tiffin in Hopewell Township. Two trees were also toppled southwest of Tiffin near the intersection of State Route 53 and U.S. Highway 224. |
| July 2005 | Flash Flood | South Portion | $100,000 | Thunderstorms dumped locally heavy rains on the southern portion of Seneca County. Rainfall rates with the stronger storms approached two inches per hour. Many roads including U.S. Route 224 southeast of Tiffin were closed because of flood waters over a foot in depth. Several secondary roads were also washed out. A few homes sustained damage from basement and lowland flooding. |
| July 2003 | Flash Flood | Countywide | $100,000 | Thunderstorms dumped two to four inches of rain on Seneca County during the late afternoon and early evening hours. Widespread street and lowland flooding occurred with many streams and creeks leaving their banks. Many roads had to be closed due to flood waters up to three feet deep. |
| July 1999 | Thunderstorm Wind | Countywide | $100,000 | Thunderstorms producing strong downburst winds downed trees and power lines throughout the county. A 75 foot by 100 foot pole barn located two miles to the northeast of Republic was completely destroyed and blown 200 feet. Just east of Cromers on State Route 53, a pole barn had an entire side blown off. A nearby garage was blown off its foundation and completely destroyed. Two cars were destroyed in Fostoria by fallen trees. |
| August 1998 | Flash Flood | Countywide | $100,000 | Heavy thunderstorm rain caused flooding of roads and low lying areas. Some roads had to be closed. Basements were flooded in the town of Attica and Clinton Mobile Home Court on State Route 101 was flooded when Willow Creek overflowed its banks. |
| July 1995 | Thunderstorm Wind | Countywide | $80,000 | no account filed |
| November 2017 | Thunderstorm Wind | Bascom | $75,000 | Thunderstorm winds estimated at 70 mph caused major damage to home on Township Road 87 east southeast of Fostoria. A garage at a property nearby was also heavily damaged. |
| March 2017 | Thunderstorm Wind | Tiffin | $75,000 | A line of thunderstorms moved across Seneca County downing at least 30 trees across the southern half of the county. Some power outages were reported as well. |
| June 2013 | Thunderstorm Wind | Green Spgs | $75,000 | Thunderstorm winds blew down a large pole barn. |
| July 2013 | Tornado (EF0) | Kansas | $75,000 | An EF0 tornado touched down southeast of Kansas just to the east of the intersection of State Route 636 and Township Road 36. The tornado was only briefly on the ground but tore the roof off of a mobile and damaged a nearby barn. A camper on property was also overturned. Many trees were also toppled and some corn was blown down in a field. The damage path was no more than 100 yards in length. A trained spotted witnessed the touchdown. |
| August 2007 | Flash Flood | Bettsville | $75,000 | Heavy rain fell across the area during the early morning hours of the 20th. Flash flooding conditions were reported during the morning hours as creeks quickly overflowed their banks and underpasses filled with three feet of water making those roads impassable. By the midday hours, flooding was reported in Bettsville and Old Fort with many roads closed including State Route 17 in Bettsville, and State Route 18 between Republic and Bellevue. During the afternoon hours, widespread flooding was reported with roads closed countywide, and evacuations were taking place in Bettsville. Flooding conditions continued through the overnight and morning hours of the 21st, but water began to recede across the area during the afternoon hours. However, runoff eventually brought the Sandusky River in Tiffin into flood. See the accompanying write up for additional information on the flooding of the Sandusky River. |
| July 2006 | Thunderstorm Wind | Fostoria | $75,000 | Numerous trees were reported down throughout the city of Fostoria. Four houses and two cars sustained damage from trees falling on them. A restaurant in Fostoria had two walls knocked down causing considerable structural damage. |
| May 2004 | Thunderstorm Wind | Countywide | $75,000 | A line of severe thunderstorms moved across Seneca County and downed dozens of trees. Scattered power outages were also reported. A few homes and vehicles were damaged by fallen trees and flying debris in Tiffin and Fostoria. |
| June 2002 | Lightning | New Riegel | $75,000 | Lightning caused a house fire. |
| October 1996 | Thunderstorm Wind | Countywide | $75,000 | no account filed |
| June 1997 | Flash Flood | Countywide | $70,000 | no account filed |
| August 2007 | Tornado (EF0) | Bettsville | $60,000 | A tornado touched down on a farm southwest of Bettsville. This touchdown occurred along Township Road 154 about a half mile to the west of State Route 635. A follow-up survey of the damage was conducted and the tornado was determined to be an EF0. The tornado damaged a metal building and a gazebo on the farm. The barn had one wall completely blown out. This tornado had a damage path about three quarters of a mile long and no more than 10 yards in width. A distinct damage path was seen in a corn field east of the farm. |
| November 2017 | Thunderstorm Wind | New Riegel | $50,000 | Thunderstorm winds downed around a dozen utility poles southeast of New Riegel along State Route 587. |
| November 2017 | Thunderstorm Wind | Attica | $50,000 | Thunderstorm winds snapped four utility poles south of Attica along State Route 4. |
| July 2013 | Flash Flood | Tiffin | $50,000 | In Tiffin, water reached between two and three feet behind Tiffin Mall on Westwood and Northwood drives. The residential area between Kroger and Miami Street was most affected as many homes had up to a foot of water in their basements. Roadways in Seneca County with high water included CR 26, east of SR 53, SR 18, west of 224 and SR 53 south of Fort Seneca. |
| May 2011 | Hail | Tiffin | $50,000 | Thunderstorms produced a swath of quarter to golf ball size hail. Numerous vehicles and homes were damaged as a result of the large hail. |
| September 2011 | Thunderstorm Wind | Tiffin | $50,000 | Thunderstorm winds downed many trees across Seneca County. |
The Survey's mineral resources record lists 14 workings inside this county. 7 still produce and 7 are closed or unrecorded. Each settlement page carries the workings within five miles of it.
| Commodity | Workings |
|---|---|
| Clay | 4 |
| Limestone, General | 3 |
| Stone, Crushed/Broken | 3 |
| Calcium | 1 |
| Chromium | 1 |
| REE | 1 |
| Limestone, Dimension, Stone, Crushed/Broken | 1 |
The least common of them first, because a county's hundredth gravel pit says nothing its first ten did not.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Basic Refractories Quarry | Calcium | Past Producer | Calcite | |
| Bellevue Quarry | Limestone, Dimension, Stone, Crushed/Broken | Producer | ||
| Maple Grove Lime Plant | Chromium | Producer | ||
| Union Carbide/ Fostoria, Ohio | REE | Producer | ||
| Bellevue Quarry | Limestone, General | Past Producer | Sedimentary | |
| Bloomville Quarry | Limestone, General | Past Producer | Sedimentary | |
| Bloomville Stone Quarry | Stone, Crushed/Broken | Producer | ||
| Flat Rock Quarry | Stone, Crushed/Broken | Producer | ||
| Maple Grove Quarry | Stone, Crushed/Broken | Producer | ||
| Northern Ohio Stone Quarry | Limestone, General | Past Producer | Sedimentary | |
| J.A. Miller Tile Company Pit | Clay | Past Producer | Sedimentary | |
| J.A. Miller Tile Company Pit | Clay | Producer | ||
| Saint Stephen Tile Co., Inc. Pit | Clay | Past Producer | Sedimentary | |
| Saint Stephen Tile Co., Inc. Pit | Clay | Past Producer |
Museum specimens collected inside this county and catalogued with a date and a place: 338 of them, by kingdom 288 animalia, 28 fungi, 21 plantae, 1 chromista. Each is a physical object in a named collection, not a sighting. Held by Ohio State University - Fish Division, Columbus, OH (OSUM), Ohio State University - Mammal Division, Columbus, OH (OSUM), Ohio State University - Bird Division, Columbus, OH (OSUM), BPI, USNM, Ohio State University - Amphibian Division, Columbus, OH (OSUM) among others, and each settlement page carries the specimens collected near it.
The oldest of them. A specimen proves something was collected on that day; its absence proves nothing.
| Photograph | Year | Species | Kingdom | Where | Collector | Catalogue |
|---|---|---|---|---|---|---|
 | 1890 | Arisaema dracontium (L.) Schott | Plantae | Green Springs | H. C. Beardslee Sr. | F V0462483F |
 | 1891 | Parus bicolor bicolor Sibley & Monroe, 1990 | Animalia | Tiffin | Cross, W | ROM ROMO55900 |
 | 1891 | Pluvialis dominica dominica (P.L.S.Müller, 1776) | Animalia | Tiffin | Cross, W | ROM ROMO37844 |
 | 1893 | Ambloplites rupestris (Rafinesque, 1817) | Animalia | Sandusky River, Tiffin, Ohio | Woolman | USNM USNM 69679 |
 | 1893 | Cambarus rusticus Girard, 1852 | Animalia | Tiffin, Sandusky River | United States Fish Commission | USNM USNM 20828 |
 | 1893 | Etheostoma blennioides Rafinesque, 1819 | Animalia | Sandusky River, Tiffin, Ohio | Woolman | USNM USNM 69625 |
 | 1893 | Etheostoma caeruleum Storer, 1845 | Animalia | Sandusky River, Tiffin, Ohio | Woolman | USNM USNM 69614 |
 | 1893 | Etheostoma nigrum Rafinesque, 1820 | Animalia | Sandusky River, Tiffin, Ohio | Woolman | USNM USNM 69618 |
History of Seneca County, Ohio, Containing a History of the County, Its Townships, Towns, Villages ... Portraits of Early Settlers and Prominent Men; Biographies; History of the Northwest Territory; History of Ohio; Statistical and Miscellaneous Matter, Etc., Etc devotes a chapter to each township: its boundaries and streams, who settled it and when, the mills, the schools and the churches. All 2 are reproduced here in full. Each row shows the township's own shape and where it lies in the county, drawn from the Census Bureau's boundary. Which settlements belong to which township is computed from that same boundary, not taken from the book.
| Shape and position in the county | Township | Settlements in it | Length | Sections |
|---|---|---|---|---|
| Seneca Township | Berwick | 942,316 words | 821 | |
| Thompson Township | Fireside, Flat Rock, Frank, Thomsontown | 240,026 words | 14 |
Everyone History of Seneca County, Ohio, Containing a History of the County, Its Townships, Towns, Villages ... Portraits of Early Settlers and Prominent Men; Biographies; History of the Northwest Territory; History of Ohio; Statistical and Miscellaneous Matter, Etc., Etc stops to write about, with the section that describes them. Among them are the men who founded the place and governed the Territory. Each name opens the passage itself, in the words of 1886.
Named settlements recorded in the Geographic Names Information System, each with the topographic sheets covering it. Villages, hamlets and abandoned places alike. Each is shown with the watercourse or landform it stands on and the survey quadrangle it falls on. The 2 places that were also surveyed for fire insurance come first, with the number of atlases and photographs held for them.
Venice township · 44807 · Attica quadrangle
12 sheets, 1915 to 1986
Fire insurance: 6 atlases
Tiffin city · 44883 · On Rock Creek · Tiffin South quadrangle
11 sheets, 1906 to 1986
Fire insurance: 8 atlases
Hopewell township · 44883 · On Bells Run · Tiffin South quadrangle
11 sheets, 1906 to 1986
Clinton township · 44883 · On Morrison Creek · Tiffin North quadrangle
11 sheets, 1906 to 1986
Bloom township · 44883 · On East Branch Rock Creek · Bloomville quadrangle
13 sheets, 1906 to 1986
No longer a settlement
Tiffin city · 44883 · On Bells Run · Tiffin South quadrangle
11 sheets, 1906 to 1986
Liberty township · 44883 · Tiffin North quadrangle
11 sheets, 1906 to 1986
No longer a settlement
Big Spring township · 43316 · New Riegel quadrangle
12 sheets, 1901 to 1986
No longer a settlement
Big Spring township · 43316 · On North Ridge · Alvada quadrangle
11 sheets, 1901 to 1986
Thompson township · 44811 · Fireside quadrangle
12 sheets, 1915 to 1986
No longer a settlement
11 topographic sheets and 8 fire insurance atlases, 1887 to 1949
The complete index, with nothing left out. Each of these is a separate record with its own page: a federal survey report, or the case file that argued a property on to the National Register. Both are public domain and reproduced word for word.
The vanished settlements of Seneca County, the places these records name that are no longer on the map.
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