Thompson is a city in Winnebago County, Iowa, home to about 459 people across 0.9 square miles. Its ZIP code is 50478.
Homes sold for a median of $78 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside Thompson. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)106 miles away |
|---|---|
| Closer regional airport | Mason City Municipal Airport (MCW)26 miles away |
| Nearest city of 250,000+ | Minneapolis, MN111 miles away |
| Nearest city of 1 million+ | Chicago, IL326 miles away |
Straight-line distances from the center of Thompson; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Thompson had 495 residents in the 2020 census, down 17% since 2000.
It’s the 488th largest of 1,019 towns in Iowa by population.
Winnebago County grew from 12,725 residents in 1900 to 10,679 in 2020.
Winnebago County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 6°F. About 35.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Forest City 2 Nne, IA weather station (9 miles away).
6,043 jobs at 300 businesses in Winnebago County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.