St. Onge Schoolhouse · National Register of Historic Places
St. Onge Township’s story
145 years in pictures
5 places on the National Register of Historic Places.
- 1881St. Onge Township is settled
St. Onge TownshipSD
Saint Onge State Bank · Photo: Jon Roanhaus · Public domain
Population
377
2025 Census estimate · +16% since 2020
Median home value
$286K
Census ACS
Median age
53.3
years
Jobs based here
89
A commuter town
Is St. Onge Township a good place to live?
Its National Register listings include Woodmen Hall and Saint Onge State Bank. St. Onge Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.
What makes St. Onge Township stand out
Where St. Onge Township beats most towns.
Small town
377 people, and everyone knows the way
In a town this size, neighbors are the best guide. Ask them anything.
Nearby towns
Getting set up
The full setup list →Moving to St. Onge Township: who provides what
Who provides power, water and the rest in St. Onge Township, and how to reach them.
PowerBlack Hills Energy15.1¢/kWh · EIA 2025HIFLD · EIA
WaterSaint Onge Sewer & Water CoNo health-based violations in 5 years · EPAEPA
Internet4 providers49% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have St. Onge Township’s trash rules yet
SchoolsBelle Fourche School District 09-1Spearfish School District 40-22 districts serve St. Onge Township; which school depends on your address and gradeNCES
Register to voteIn personSouth Dakota has no online registration; you can register in person until 15 days before Election Day or by mail (received 15 days before).vote.govWho runs elections hereLawrence County AuditorLawrence County; contacts on the Handbook page.FVAP, Jul 2023
ZIP codes57779, 5779357779 97% · 57793 3%Census 2020
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.
The data
Ordered by what stands out in St. Onge Township.
Work & commute
St. Onge Township stands out in South Dakota and nationally, with the average trip to work longer than most
Among 36 South Dakota towns, just 3 have a lower share of working residents who work in town than St. Onge Township. Jobs based in St. Onge Township grew to 89 in 2023, 24 more than in 2013. The top destinations are Spearfish (29%), Rapid City (19%) and Sturgis (11%). Half of commuters travel less than 12 miles.
1%work in town
| St. Onge Township | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Working residents who work in town | 1.4% | 29% | 8% |
| Average trip to work | 29 minutes | 17 minutes | 25 minutes |
Where working residents work
In St. Onge Township1%
Spearfish29%
Rapid City19%
Sturgis11%
Deadwood6%
12 mi
median commute distance
89
jobs based in St. Onge Township
A commuter town
jobs vs. working residents
Census LEHD 2023 · ACS
Natural hazards
Top of a high hazard risk in St. Onge Township: inland flooding
Federal disaster aid has reached households in St. Onge Township once, in 2008. On expected storm and flood damage, St. Onge Township sits above 70% of U.S. communities. FEMA puts two fifths of the town’s expected hazard losses down to inland flooding, and 26% to wildfires.
70risk score of 100
FEMA risk score
Inland floodingWildfireCold waves
1
federal disasters paid out here
FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA
Climate
In St. Onge Township, expect snowy winters and pleasant summers
The July high for St. Onge Township comes to 87°F, above both the South Dakota town median (85°F) and the median of U.S. towns (85°F).
42″snow a winter
Typical low → high °F
Winter15–37°
Spring33–58°
Summer56–83°
Fall35–61°
Sep 30
typical first frost
May 10
typical last frost
+1.1°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
Health
How healthy St. Onge Township is
34% of St. Onge Township adults have high blood pressure, above South Dakota’s towns (31%) and close to U.S. towns (35%). Against the South Dakota average, St. Onge Township comes out ahead on 4 CDC measures out of 26, and behind on 2. In St. Onge Township, 13% of adults report frequent mental distress.
| St. Onge Township | South Dakota towns | U.S. towns | |
|---|---|---|---|
| Frequent mental distress (CDC PLACES) | 13% | 15% | 17% |
| Sleep under 7 hours (CDC PLACES) | 28% | 30% | 36% |
| Depression (CDC PLACES) | 20% | 22% | 23% |
| Binge drink (CDC PLACES) | 18% | 19% | 16% |
26 measures vs. South Dakota
4 better20 too close to call2 worse
| What stands out | St. Onge Township | SD |
|---|---|---|
| Fewer older adults who have lost all their teeth | 7.4% | 12.7% |
| Fewer adults in frequent mental distress | 13% | 15.3% |
| More adults who have had cancer | 11.5% | 9.2% |
Monument Health Spearfish Hospital
7 mi away · emergency room
1 of 3
care shortages: mental health
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Outdoors
0% of St. Onge Township is conserved land
4.9 miles of trail. In St. Onge Township, the concentration of trails is 0.1 miles per square mile.
0%conserved
0%
conserved · 0 of 22,770 acres
4.9 mi
of trails · 0.1 per sq mi
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Nearby attractions
All 18 attractions →Terry Peak Ski Area and 2 more within 40 miles
Museums, parks, gardens and other places to visit around St. Onge Township. Close and well known come first.
16 mi Ski areaTerry Peak Ski Area28 runs · 1,075 ft vertical18 mi Ski areaDeer Mountain Village52 runs · 615 ft vertical13 mi MuseumAdams Museum & House
Sources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership
Keep exploring
Everything we know about St. Onge Township
17pages on St. Onge Township
The big questions
Out and about
The story
After high school
Colleges nearby
1 within 15 miles of the center of St. Onge Township
College town 15 of every 100 St. Onge Township residents are enrolled in college, against 5 across South Dakota.
A commuter town
99% of working residents leave St. Onge Township for work
Where St. Onge Township’s working residents go each day. Line width shows the share.
89jobs based in St. Onge Township
1%of working residents work in town
12 mimedian commute distance
Census LEHD 2023
Landmarks
5 places in St. Onge Township on the National Register of Historic Places.
About St. Onge Township
Census-designated place in South Dakota, United States
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)
- Area
- 1.3 sq mi
- Elevation
- 3,432 ft
- ZIP code
- 57779
Questions about St. Onge Township
Short answers, built from the data on this page.
Is St. Onge Township, SD a good place to live?
St. Onge Township has fewer than 1,000 residents, too few for fair grades; the figures below are still real.