Coulter is a city in Franklin County, Iowa, home to about 228 people across 2.5 square miles. Its ZIP code is 50431, and parts of 50452 are in Coulter too.
Homes sold for a median of $75 per square foot in the three months ending August 2026, a buyer’s market.
All in Coulter
Mostly Latimer; part is in Coulter
Each card is that ZIP code’s whole market, including any part outside Coulter. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Coulter’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Des Moines International Airport (DSM)85 miles away |
|---|---|
| Closer regional airport | Mason City Municipal Airport (MCW)28 miles away |
| Nearest city of 250,000+ | St. Paul, MN152 miles away |
| Nearest city of 1 million+ | Chicago, IL297 miles away |
Straight-line distances from the center of Coulter; 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.
Coulter had 219 residents in the 2020 census, down 16% since 2000.
It’s the 676th largest of 1,019 towns in Iowa by population.
Franklin County grew from 14,996 residents in 1900 to 10,019 in 2020.
Franklin County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 8°F. About 38.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Hampton, IA weather station (8 miles away).
3,139 jobs at 285 businesses in Franklin 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 (1 nearby)
Counts are within about 1.5 miles 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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Shares ZIP codes with Latimer.
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.