Winthrop, Iowa
11 topographic sheets cover this place, the earliest surveyed in 1903 and the latest in 1984. It stands in Byron Township. It lies in ZIP code area 50682. The Survey maps it on the Winthrop quadrangle. 823 people lived here at the 2020 count. It stands 1,053 feet above sea level.
Population over time
2 figuresWinthrop fell from 850 to 823 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, and an estimate published within five years of a census is left out. 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 | 850 | |
| 2020 | 823 | -27 (-3%) |
Topographic sheets covering this place
7 surveys from 11 printed sheetsMatched 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.
- 1903 USGS Winthrop quadrangle1:125000, 2 printings
- 1959 USGS Dubuque quadrangle1:250000
- 1961 USGS Dubuque quadrangle1:250000
- 1962 USGS Dubuque quadrangle1:250000, 2 printings
- 1973 USGS Winthrop quadrangle1:24000, 2 printings
- 1976 USGS Dubuque quadrangle1:250000
- 1984 USGS Anamosa quadrangle1:100000, 2 printings
Fires near this place
1 since 2015Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1 fire within 5 miles of Winthrop in 2015, burning about 65 acres in total. None started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Debris and open burning | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 19 October 2015 | Debris and open burning | 65 acres | Iowa Department of Natural Resources | not named |
Settlements close enough to share some of these fires:
Mines and quarries near this place
3 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 3 workings within 5 miles of Winthrop: 2 past producers, 1 producer. 1 still produces. What was taken out: Sand and Gravel, Construction, Stone, Crushed/Broken. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Rasmussen Quarry | Stone, Crushed/Broken | Producer | ||
| Unknown | Sand and Gravel, Construction | Past Producer | ||
| Unknown | Sand and Gravel, Construction | Past Producer |
Storms near this place
23 since 1993Regional context, not property-specific evidence. The National Weather Service names Winthrop in 23 storm reports between 1993 and 2025: 10 thunderstorm wind, 5 tornado, 5 flash flood, 3 hail. 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 |
|---|---|---|---|---|
| June 2001 | Tornado (F1) | Winthrop | $125,000 | no account filed |
| June 1998 | Thunderstorm Wind | Winthrop | $30,000 | Gusty thunderstorm winds ripped portions of the roof off a building supply company causing extensive damage to the building, office equipment, and building materials. Nearly all of the office equipment was ruined due to water damage along with the wind damage. |
| June 2001 | Tornado (F0) | Winthrop | $10,000 | no account filed |
| April 2004 | Thunderstorm Wind | Winthrop | $5,000 | no account filed |
| August 1993 | Hail | Winthrop | $500 | no account filed |
| July 2025 | Flash Flood | Winthrop | - | Law Enforcement Officers report water flowing over the roadway. |
| July 2024 | Thunderstorm Wind | Winthrop | - | The Emergency Manager reported a tree blown down on a car. The time of the event was estimated using radar. |
| July 2022 | Tornado (EFU) | Winthrop | - | Video from a Winthrop Fire Department Spotter captured a brief tornado just west of Winthrop. The tornado occurred in open farm land, and there was no observable damage to assign an EF-scale rating. Time estimated by radar. Assistance from Buchanan County Emergency Management is greatly appreciated. |
| July 2020 | Thunderstorm Wind | Winthrop | - | Emergency management reports a large swath of corn blown down near Winthrop, due to straight line winds. |
| October 2018 | Flash Flood | Winthrop | - | Flash flooding caused washouts of gravel roads, and closed some roads in the Winthrop area. |
| June 2015 | Thunderstorm Wind | Winthrop | - | Tree branches between 6 and 10 inches in diameter were blown down. |
| May 2013 | Flash Flood | Winthrop | - | A trained spotter reported streets flooded and water onto lawns, along with creeks out of their banks. There was also considerable flooding of fields. |
| July 2013 | Thunderstorm Wind | Winthrop | - | Wind gusts were estimated to be 60 mph in Winthrop, IA at 705 pm CDT July 22. |
| July 2012 | Thunderstorm Wind | Winthrop | - | The public reported tree limbs up to 5 inches in diameter were down near Winthrop. |
| August 2010 | Flash Flood | Winthrop | - | Heavy rains resulted in some flash flooding of several intersections along County Road W45 along Buffalo Creek from Wintrop, IA to Monti, IA during the afternoon of August 13. |
| August 2005 | Tornado (F0) | Winthrop | - | Rated high F0 with winds estimated at 57 knots (65 mph). Based on areal video footage from KCRG TV Chopper 9. |
| June 2002 | Flash Flood | Winthrop | - | Buffalo Creek flooded with water inundating portions of County Road 939 East. 2.7 inches of rain was measured in about an hours time. |
| April 2023 | Hail | Winthrop | - | no account filed |
| April 2023 | Hail | Winthrop | - | no account filed |
| June 2018 | Thunderstorm Wind | Winthrop | - | no account filed |
| June 2001 | Tornado (F0) | Winthrop | - | no account filed |
| June 2000 | Thunderstorm Wind | Winthrop | - | no account filed |
| August 1998 | Thunderstorm Wind | Winthrop | - | no account filed |
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.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Doris | 4.3 miles | 11 | |
| Quasqueton | 5.6 miles | 11 | |
| Gatesville | 5.6 miles | 11 | |
| Independence | 8.2 miles | 11 | |
| Monti | 8.4 miles | 11 | |
| Rowley | 9.2 miles | 11 | |
| Lamont | 9.9 miles | 13 | |
| Aurora | 10.0 miles | 13 |
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 Winthrop | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q280423 | 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 463139. 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.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
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.






