Castalia is a city in Winneshiek County, Iowa, home to about 142 people across 0.6 square miles. It has no ZIP code of its own: it’s part of 52133.
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)143 miles away |
|---|---|
| Closer regional airport | Waterloo Regional Airport (ALO)55 miles away |
| Nearest city of 250,000+ | Madison, WI113 miles away |
| Nearest city of 1 million+ | Chicago, IL222 miles away |
Straight-line distances from the center of Castalia; 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.
Castalia had 145 residents in the 2020 census, down 17% since 2000.
It’s the 780th largest of 1,019 towns in Iowa by population.
Winneshiek County grew from 23,731 residents in 1900 to 20,070 in 2020.
Winneshiek 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 7°F. About 39 inches of rain and melted snow fall in a typical year, with about 40 inches of snow.
Source: NOAA 1991–2020 climate normals, Postville, IA weather station (6 miles away).
9,065 jobs at 604 businesses in Winneshiek 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.
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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.