St. Marys is a city in Warren County, Iowa, home to about 96 people across 0.1 square miles. Its ZIP code is 50241.
All in St. Marys
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| Nearest major airport | Des Moines International Airport (DSM)16 miles away |
|---|---|
| Nearest city of 250,000+ | Omaha, NE120 miles away |
| Nearest city of 1 million+ | Chicago, IL315 miles away |
Straight-line distances from the center of St. Marys; 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.
St. Marys had 108 residents in the 2020 census, down 19% since 2000.
It’s the 863rd largest of 1,019 towns in Iowa by population.
Warren County grew from 20,376 residents in 1900 to 52,403 in 2020.
Warren County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 12°F. About 37.8 inches of rain and melted snow fall in a typical year, with about 31 inches of snow.
Source: NOAA 1991–2020 climate normals, Indianola 2w, IA weather station (6 miles away).
9,993 jobs at 1,020 businesses in Warren 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.
Pharmacies
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.