St. Onge is a community in Lawrence County, South Dakota, home to about 40 people across 1.3 square miles. It has no ZIP code of its own: it’s part of 57779.
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| Nearest major airport | Denver International Airport (DEN)327 miles away |
|---|---|
| Closer regional airport | Rapid City Regional Airport (RAP)48 miles away |
| Nearest city of 250,000+ | Denver, CO336 miles away |
| Nearest city of 1 million+ | Chicago, IL829 miles away |
Straight-line distances from the center of St. Onge; 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. Onge had 170 residents in the 2020 census, down 11% since 2010.
It’s the 382nd largest of 440 towns in South Dakota by population.
Lawrence County grew from 17,897 residents in 1900 to 25,768 in 2020.
Lawrence County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 16°F. About 21.4 inches of rain and melted snow fall in a typical year, with about 71 inches of snow.
Source: NOAA 1991–2020 climate normals, Spearfish, SD weather station (8 miles away).
11,109 jobs at 1,248 businesses in Lawrence 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.