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St. Onge

A township of 326 people in Lawrence County, South Dakota
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The places and views that make it St. Onge

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Outdoors in St. Onge

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Conserved land0%none recorded
Trails4.9 mi0.1 mi per sq mi
Parks & preserves0named on the map

Know a trail or park that’s missing? Anyone can add it to OpenStreetMap, and it shows up here on the next refresh.

Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US

Landmark of the day

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St. Onge Schoolhouse

St. Onge Schoolhouse

Gothic Revival · on the Register since 1980

St. Onge Schoolhouse was added to the National Register of Historic Places on May 7, 1980. It is significant for its education and architecture at the local level. Its architecture is described as Gothic Revival.

5 on the National Register · #31 in SDHistoric places →
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About St. Onge

Census-designated place in South Dakota, United States
170Population
1.3 sq miArea
3,432 ftElevation

Saint Onge (pronounced "saynt AHNJ'") is an unincorporated community and census-designated place (CDP) in Lawrence County, South Dakota, United States. As of the 2020 census, the population was 170.

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code57779
Living in St. Onge

Work & commute in St. Onge

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Most working residents leave St. Onge for work: only 1% work in town. The top destinations are Spearfish (29%), Rapid City (19%) and Sturgis (11%). Half commute less than 12 miles.

Spearfish
29%
Rapid City
19%
Sturgis
11%
Deadwood
6%
Census LEHD 2023 · ACSWork & commute in St. Onge →

Health in St. Onge

Compared with South Dakota

4better than SD·2worse

of 26 measures CDC estimates. The other 20 are too close to call.

BetterToo close to callWorse

What stands out

Care nearby

Monument Health Spearfish HospitalSpearfish · 7 mi · ER
Cornerstone Rescue Mission - Men's ShelterRapid City · 42.4 mi · sliding-scale fees
Primary careNo shortage
DentalNo shortage
Mental healthShortage · county-wide
CDC PLACES 2025 · modeled estimates for adults · ZIP codes 57779, 57793 · CMS · HRSAHealth in St. Onge →

Natural hazards in St. Onge

70
High

Expected storm and flood damage is higher than in 70% of U.S. communities.

🌊 Inland flooding🔥 Wildfire🥶 Cold waves
FEMA National Risk Index December 2025 · OpenFEMANatural hazards in St. Onge →

Climate in St. Onge

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St. Onge has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 87°, a January night drops to 14°, and about 42 inches of snow falls in a normal winter.

37° / 15°Winter
58° / 33°Spring
83° / 56°Summer
61° / 35°Fall
NOAA U.S. Climate Normals, 1991–2020Climate in St. Onge →

Libraries near St. Onge

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Nearest: Grace Balloch Memorial LibrarySpearfish · 7.4 miles · 57 hrs a week
Famous people from St. OngeWriters, athletes, leaders and more who were born in St. Onge.Meet them →

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You’re in St. Onge, SDLawrence CountyView boundary

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/15 · 2025-01-01