St. Onge township, South Dakota
St. Onge township profile, demographic data, and geographic information.
St. Onge township is a geographic entity located in Lawrence County, South Dakota. As of official census estimates, it has a reported population of 377. The land area covers 35.77 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population (2025 PEP Estimate) | 377 | — | 2025 / Census |
| Median Age | 53.3 yrs | ±7 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 174 | ±114 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 219 | ±122 |
| Occupied Housing Units | 174 | ±114 |
| Vacant Housing Units | 45 | ±69 |
| Median Home Value | $286,400 | ±$130,377 |
| Median Gross Rent | Suppressed | — |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | Suppressed | — |
| Per Capita Income | $80,507 | ±$38,954 |
| Poverty Rate | 0% | ±2.9% |
| Population Below Poverty Level | 0 | ±10 |
| Unemployment Rate | 0% | ±3.9% |
| Civilian Labor Force, Employed | 258 | ±167 |
| Broadband Internet Rate | 93.7% | ±22.9% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
TOWNSHIP OF ST ONGE
GUS Population: 365 (2024)
ID: 225726
|
Township | Official Local Government |
Contact: TOWNSHIP SUPERVISOR
PO BOX 213, SAINT ONGE SD 57779-0213
|
|
GUS Population: 28,809 (2024)
ID: 184157
|
County | Official County Government |
Contact: DEPUTY AUDITOR
PO BOX F, DEADWOOD SD 57732
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Nearby | 09-12 | Belle Fourche, SD | |
| Regular School Nearby | 05-08 | Belle Fourche, SD | |
| Alternative School Nearby | 04-08 | Spearfish, SD | |
| Alternative School Nearby | 09-12 | Spearfish, SD | |
| Regular School Nearby | 03-05 | Spearfish, SD | |
| Special Education School Nearby | PK-12 | Sturgis, SD | |
| Regular School Nearby | KG-05 | Deadwood, SD | |
| Regular School Nearby | 09-12 | Lead, SD | |
| Regular School Nearby | 06-08 | Lead, SD | |
| Regular School Nearby | KG | Spearfish, SD |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 8 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Black Hills State University
|
College | 7.6 mi away | 1200 University St, Spearfish, SD, 57799-9500 |
8002552478
|
|
GRACE BALLOCH MEMORIAL LIBRARY
|
Library | 7.4 mi away | 625 NORTH FIFTH STREET, SPEARFISH, SD, 57783 |
(605) 642-1330
|
|
WHITEWOOD PUBLIC LIBRARY
|
Library | 8.7 mi away | 1201 ASH ST, WHITEWOOD, SD, 57793 |
(605) 269-2616
|
|
BELLE FOURCHE PUBLIC LIBRARY
|
Library | 9.0 mi away | 905 5TH AVE, BELLE FOURCHE, SD, 57717 |
(605) 892-4407
|
|
DEADWOOD PUBLIC LIBRARY
|
Library | 12.7 mi away | 435 WILLIAMS ST, DEADWOOD, SD, 57732 |
(605) 578-2821
|
|
PHOEBE APPERSON HEARST FREE LIBRARY
|
Library | 14.4 mi away | 315 WEST MAIN, LEAD, SD, 57754 |
(605) 584-2013
|
|
STURGIS PUBLIC LIBRARY
|
Library | 15.4 mi away | 1040 HARLEY-DAVIDSON WAY, SUITE 101, STURGIS, SD, 57785 |
(605) 347-2624
|
|
NEWELL PUBLIC LIBRARY
|
Library | 19.3 mi away | 208 GIRARD, NEWELL, SD, 57760 |
(605) 456-2179
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at SPEARFISH, SD US, located 7.5 miles from St. Onge township. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 35.9° | 15.7° | 25.8° | 0.60" | 8.2" |
| February | 36.9° | 16.3° | 26.6° | 0.91" | 12.7" |
| March | 45.8° | 24.2° | 35.0° | 1.19" | 12.0" |
| April | 54.9° | 32.0° | 43.5° | 2.23" | 8.5" |
| May | 64.3° | 41.8° | 53.1° | 3.72" | 2.3" |
| June | 75.3° | 51.3° | 63.3° | 3.51" | 0.0" |
| July | 83.6° | 57.6° | 70.6° | 2.35" | 0.0" |
| August | 82.9° | 56.1° | 69.5° | 1.88" | 0.0" |
| September | 74.0° | 47.6° | 60.8° | 1.56" | 0.1" |
| October | 58.1° | 35.4° | 46.8° | 2.04" | 5.5" |
| November | 45.9° | 25.6° | 35.7° | 0.70" | 6.3" |
| December | 37.2° | 17.5° | 27.3° | 0.72" | 14.9" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| St. Onge CDP | CDP | 1.7 mi | — |
| Spearfish city | City | 5.8 mi | — |
| Fruitdale town | Town | 7.9 mi | — |
| North Spearfish CDP | CDP | 8.4 mi | — |
| Mountain Plains CDP | CDP | 8.6 mi | — |
| Whitewood city | City | 8.7 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 4608157300. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.