Stanley County, South Dakota
Stanley County: County in South Dakota, United States
About
Stanley County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 2,966 and a population density of 1 people per km². After 10 years in 2020 county had an estimated population of 3,121 inhabitants. Its county seat is Fort Pierre. The county was created 152 years ago in 1872.

Quick Facts about Stanley County
Population : | 3,121 (2020) |
Country : | United States of America |
State : | South Dakota (United States) |
Different from : | Stanly County |
Area : | 3929 km2 |
Water as percent of area : | 4.8% |
Land as percent of area : | 95.2% |
Named for : | David S. Stanley |
Altitude : | 2,018 feet / 615 meters |
Capital : | Fort Pierre |
Establishment : | January 01, 1873 |
Time Zone : | UTC−07:00, America/Denver, UTC−06:00 |
Local time : | 10:15:32 (22nd February 2025) |
Density : | 1 Pop. per km² as of 2020 |
Population growth : | 4.97% (2010-2020) |


Geography
Stanley County is located at 44°24'44"N 100°44'9"W (44.4123200, -100.7359400).
Stanley County map
The largest city of Stanley County is Fort Pierre with a population of 2,236. . See all Stanley County cities & populated places.
Stanley County Populated Places
Cities, towns, neighborhoods & other populated places in Stanley County.
City Name | Population | Title |
---|---|---|
Fort Pierre | 2,236 | City in South Dakota, United States of America |
- Official Website
Official website of Stanley County
Stanley County has 1 neighbours.
- Dewey County county in South Dakota, United States of America
- Fort Pierre
Demographics
The population of Stanley County increased by 4.97% in 10 years.
Year | Population | % Change | Method |
2010 | 2,966 | - | census |
2011 | 2,978 | 0.4% | estimation process |
2012 | 2,976 | -0.07% | estimation process |
2013 | 2,979 | 0.1% | estimation process |
2014 | 2,979 | 0% | estimation process |
2015 | 2,974 | -0.17% | estimation process |
2016 | 3,012 | 1.26% | estimation process |
2017 | 2,986 | -0.87% | estimation process |
2018 | 3,017 | 1.03% | estimation process |
2019 | 3,098 | 2.61% | estimation process |
2020 | 3,121 | 0.74% | estimation process |
South Dakota Other Counties (more counties)
County Name | Population | Title |
---|---|---|
Minnehaha County | 196,659 | County in South Dakota, United States of America |
Sioux Falls | 157,584 | The largest city in South Dakota. |
Pennington County | 115,926 | County in South Dakota, United States of America |
Rapid City | 77,503 | The second most populous city in South Dakota. |
Lincoln County | 63,019 | County in South Dakota, United States |
Brown County | 38,738 | County in South Dakota, United States |
Brookings County | 35,603 | County in South Dakota, United States of America |
Meade County | 28,588 | County in South Dakota, United States |
Codington County | 28,186 | County in South Dakota, United States of America |
Lawrence County | 26,221 | County in South Dakota, United States |
Yankton County | 22,742 | County in South Dakota, United States |
Watertown | 22,303 | City in and county seat of Codington County, South Dakota, United States |
Davison County | 19,812 | County in South Dakota, United States of America |
Beadle County | 18,513 | County in South Dakota, United States |
Hughes County | 17,336 | County in Oklahoma, United States |
Union County | 16,192 | County in South Dakota, United States |