Decorative drawing: a small American settlement seen from a low hill. Not a photograph of this place.

Delphos, Ohio

14 topographic sheets cover this place, the earliest surveyed in 1911 and the latest in 1986. It lies in ZIP code area 45833. The Survey maps it on the Delphos quadrangle. 7,117 people lived here at the 2020 count. It stands 774 feet above sea level.

Delphos within Allen County

Population over time

2 figures

Delphos grew from 7,101 to 7,117 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

Year	People	Change
2010	7,101
2020	7,117	+16 (+0%)

Then and now

1911 to 1986

The same ground, surveyed 75 years apart. Drag the handle to wipe between them. Both sheets are United States Geological Survey originals; neither has been altered.

Topographic sheet of Delphos, surveyed 1986

Topographic sheet of Delphos, surveyed 1911

Topographic sheets covering this place

14 sheets

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

Specimens collected nearby

12 of 86 shown

Museums hold 86 specimens collected within 10 miles of Delphos between 1865 and 1975: 84 Animalia, 2 Plantae. 12 distinct Species records are shown. Collected by *ood, Almen N., Fischer, Roland L, Foster, T. (Todd) and others. Each is a physical object with a catalogue number, and each entry opens the museum's record. This is what was collected and kept, not a survey of what lives here - nothing can be concluded from a species being absent.

Species	Year	Collected by	Where, as recorded
Lophanthus nepetoides (L.) Benth.	1865	Holzer, L.	Delphos
Lepomis humilis (Girard, 1858)	1939	Roszman, F. D.	Jennings Creek, within Van Wert Co, Van Wert County, township n/a
Orconectes rusticus (Girard, 1852)	1939	R. Rhoades & C. Clark	Jennings Creek on SR 116
Etheostoma blennioides blennioides Rafinesque, 1819	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Etheostoma flabellare Rafinesque, 1819	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Etheostoma nigrum Rafinesque, 1820	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Hyborhynchus notatus (Rafinesque, 1820)	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Hypentelium nigricans (Lesueur, 1817)	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Notropis cornutus chrysocephalus (Rafinesque, 1820)	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Notropis spilopterus (Cope, 1867)	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Notropis umbratilis (Girard, 1856)	1941	Trautman, M. B. (Milton Bernard) & Wascko, H. L. (Harold L.)	Auglaize River, at US 30, 2.3 miles east of Delphos OH, Marion Township section 28
Palaemonetes kadiakensis M.J.Rathbun, 1902	1941	R. Rhoades & C. Clark	N. of Spencerville

All 86 specimens within 10 miles, at the Global Biodiversity Information Facility.

Mines and quarries nearby

3 within 5 miles

The federal mineral resources record lists 3 workings within 5 miles of Delphos: 1 past producer, 1 plant, 1 producer. 2 still produce. What was taken out: Stone, Crushed/Broken, Limestone, General. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status	Recorded
Suever Stone Quarry	Limestone, General	Past Producer	Sedimentary
Delphos Quarry	Stone, Crushed/Broken	Producer
Suever Stone Quarry & Mill	Stone, Crushed/Broken	Plant

Every working recorded in Allen County

Storms nearby

21 since 1998

The National Weather Service names Delphos in 21 storm reports between 1998 and 2025: 10 thunderstorm wind, 9 hail, 1 tornado, 1 lightning. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

When	Event	Place named	Harm	What the report says
July 2006	Lightning	Delphos	$80,000	Lightning was believed to the cause of a fire at a 2 story residence in Delphos. The home was a total loss with the value estimated at $80,000.
September 2002	Tornado (F1)	Delphos	$50,000	Emergency management reported power lines and large trees were blown down. 6 homes suffered shingle and window damage.
May 2025	Thunderstorm Wind	Delphos	$10,000	Pictures of a 100+ year-old tree uprooted at the Delphos Waterworks Park. Tree fell onto and destroyed a shelter.
June 2006	Thunderstorm Wind	Delphos	$10,000	Numerous trees and power lines down.
July 2005	Thunderstorm Wind	Delphos	$5,000	Numerous trees and power lines were blown down in Delphos.
April 2025	Hail	Delphos	$500	no account filed
March 2023	Hail	Delphos	-	Pictures on Twitter show a few hailstones ranging from penny size to quarter size hail.
June 2011	Thunderstorm Wind	Delphos	-	Emergency management officials reported trees down as well as 15 to 20 power poles in the city of Delphos. A 62 mph wind gust was recorded in Delphos.
June 2011	Hail	Delphos	-	A trained spotter reported hail ranging from pea to nickle size.
May 2010	Hail	Delphos	-	A trained spotter reported penny to nickel size hail.
June 2010	Thunderstorm Wind	Delphos	-	An amateur radio operator measured a 62 mph gust.
May 2010	Thunderstorm Wind	Delphos	-	A swath of damage continued across the town of Delphos from Van Wert County into Allen County, near the intersection of West First Street and South Main Street. Tree damage was noted along the way, with minor clay roof pieces damaged on a McDonald's restaurant. As the wind exited the town, a home in the 9000 block of Lincoln Highway had the west side of its roof blown off. The strong wind then crossed US 30, flipping a semi and continuing east until severe damage occurred to a pole barn where the roof and debris was thrown around one tenth of a mile. No damage was observed after this point. Wind speeds are estimated in the 75 to 80 mph range.
May 2004	Thunderstorm Wind	Delphos	-	Law enforcement reported trees and power lines down east of Delphos.
July 2002	Thunderstorm Wind	Delphos	-	Emergency Management reported numerous trees and power lines down in Delphos.
July 2001	Thunderstorm Wind	Delphos	-	Trees and power lines down.
May 2000	Thunderstorm Wind	Delphos	-	Trees down.
May 1998	Hail	Delphos	-	HAIL COVERED THE GROUND
May 2010	Hail	Delphos	-	no account filed
May 2004	Hail	Delphos	-	no account filed
May 2004	Hail	Delphos	-	no account filed
July 1999	Hail	Delphos	-	no account filed

Every storm recorded in Allen County

Nearest settlements

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Place	Distance	Sheets
Holland Court	0.8 miles	14
Landeck	3.8 miles	14
Scotts Crossing	4.1 miles	14
Needmore (historical)	4.8 miles	14
Southworth	5.5 miles	14
Hartford (historical)	7.5 miles	14
Gomer	8.2 miles	14
Elida	8.2 miles	14

Elsewhere

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

Wikipedia article on Delphos	An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q768210	The structured record the population and elevation above come from. Public domain (CC0).

Provenance

This settlement is recorded in the Geographic Names Information System as feature 1056973. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Specimens. Global Biodiversity Information Facility (GBIF), https://www.gbif.org/. Only records licensed CC0 or CC BY are used. Records licensed CC BY-NC are excluded because this site carries advertising. Images are checked individually and any whose licence is non-commercial, no-derivatives or unreadable is refused.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.