Saint Onge, South Dakota
Saint Onge: Unincorporated community in South Dakota
About
Saint Onge is a city located in the county of Lawrence in the U.S. state of South Dakota. Its population at the 2010 census was 339 and a population density of 97 people per km². After 10 years in 2020 city had an estimated population of 364 inhabitants.
Quick Facts about Saint Onge
| Population : | 364 (2020) |
| Country : | United States of America |
| State : | South Dakota (United States) |
| County : | Lawrence County |
| Area : | 3.48 km2 |
| Time Zone : | America/Denver |
| Local time : | 04:27:58 (5th December 2025) |
| Postal code : | 57779 |
| Density : | 105 Pop. per km² as of 2020 |
| Population growth : | 6.87% (2010-2020) |
Geography
Saint Onge is located at 44°32'48"N 103°43'16"W (44.5466500, -103.7210300).
Saint Onge map
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Demographics
The population of Saint Onge increased by 6.87% in 10 years.
| Year | Population | % Change | Method |
| 2010 | 339 | - | census |
| 2011 | 344 | 1.45% | estimation process |
| 2012 | 344 | 0% | estimation process |
| 2013 | 349 | 1.43% | estimation process |
| 2014 | 345 | -1.16% | estimation process |
| 2015 | 345 | 0% | estimation process |
| 2016 | 351 | 1.71% | estimation process |
| 2017 | 356 | 1.4% | estimation process |
| 2018 | 358 | 0.56% | estimation process |
| 2019 | 361 | 0.83% | estimation process |
| 2020 | 364 | 0.82% | estimation process |
Saint Onge zip code is 57779.
County name: Lawrence, County
fips: 46081
Schools in Saint Onge
College & universities near Saint Onge, SD
| Code | Name | City | ZIP |
|---|---|---|---|
| 219046 | Black Hills State University | Spearfish (SD) | 57799-9500 |
Post offices near Saint Onge
| Post Office Name | City | ZIP |
|---|---|---|
| Saint Ong Post Office | Saint Onge (SD) | 57779 |
Other cities in Lawrence County
Cities, towns, neighborhoods & other populated places in Lawrence County , SD.
| City Name | Population | Title |
|---|---|---|
| Spearfish | 11,900 | City in Lawrence County, South Dakota, United States |
| Lead | 2,947 | City in South Dakota, United States of America |
| North Spearfish | 2,285 | Census-designated place in Lawrence County, South Dakota, United States |
| Deadwood | 1,294 | City in and county seat of Lawrence County, South Dakota, United States |
| Whitewood | 999 | City in Lawrence County, South Dakota, United States |
| Preston | 184 | Township in Brookings County, South Dakota |
| Central City | 131 | City in Lawrences County, South Dakota, United States |
| Englewood | 19 | Human settlement in United States of America |
