Doon is a city in Lyon County, Iowa, home to about 529 people across 0.7 square miles. Its ZIP code is 51235.
Homes sold for a median of $189 per square foot in the three months ending August 2026.
Mostly Doon
Each card is that ZIP code’s whole market, including any part outside Doon. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Doon’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Eppley Airfield (OMA)138 miles away |
|---|---|
| Closer regional airport | Sioux Falls Regional Airport (FSD)34 miles away |
| Nearest city of 250,000+ | Omaha, NE140 miles away |
| Nearest city of 1 million+ | Chicago, IL445 miles away |
Straight-line distances from the center of Doon; 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.
Doon had 619 residents in the 2020 census, up 16% since 2000.
It’s the 461st largest of 1,019 towns in Iowa by population.
Lyon County grew from 13,165 residents in 1900 to 11,934 in 2020.
Lyon County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 6°F. About 29.1 inches of rain and melted snow fall in a typical year, with about 35 inches of snow.
Source: NOAA 1991–2020 climate normals, Rock Rapids, IA weather station (10 miles away).
3,746 jobs at 402 businesses in Lyon 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.
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Northwest Iowa Protestant Reformed SchoolDoon | K–8 | 22 | Calvinist | 1.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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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.