Garrison is a city in Benton County, Iowa, home to about 286 people across 0.3 square miles. Its ZIP code is 52229.
Homes sold for a median of $76 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Garrison. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Des Moines International Airport (DSM)88 miles away |
|---|---|
| Closer regional airport | The Eastern Iowa Airport (CID)30 miles away |
| Nearest city of 250,000+ | Madison, WI153 miles away |
| Nearest city of 1 million+ | Chicago, IL231 miles away |
Straight-line distances from the center of Garrison; 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.
Garrison had 344 residents in the 2020 census, down 17% since 2000.
It’s the 614th largest of 1,019 towns in Iowa by population.
Benton County grew from 25,177 residents in 1900 to 25,575 in 2020.
Benton 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 8°F. About 38.1 inches of rain and melted snow fall in a typical year, with about 34 inches of snow.
Source: NOAA 1991–2020 climate normals, Vinton, IA weather station (8 miles away).
4,296 jobs at 535 businesses in Benton 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.