Stanley County, South Dakota
Stanley County, South Dakota, has 3,018 residents (July 2025 estimate). Its county seat is Fort Pierre. It uses Central Time and Mountain Time and covers 1,444 sq mi (3,741 km²) of land.
- Resident population, July 2025
- 3,018
- Land area
- 1,444 sq mi (3,741 km²)
- County seat or government
- Fort Pierre
- Time zone
- Central Time, Mountain TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $87,712 ± $25,802
- Median home value
- $203,500 ± $67,875
- Median rent, with utilities
- $952 ± $132
- Homes lived in by their owners
- 83.1% ± 6.2 points
- County type
- County
- Metro or micro area
- Pierre, SD micro areaCentral county
- Water area
- 72.7 sq mi (188 km²)
- State
- South Dakota
- County code (FIPS)
- 46117
- Coordinates (central point)
- 44.413984, -100.747822
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Stanley County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
| Mountain TimeAmerica/Denver | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Stanley County straddles a time-zone line; check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
4 ZIP Code areas overlap Stanley County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
Stanley County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Stanley County, largest first
- Stanley County School District 57-13,015 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Tribal areas in Stanley County, largest first
American Indian, Alaska Native and Native Hawaiian areas as the Census Bureau maps them, with at least 2% of their area here, water included. These lines don’t decide membership, jurisdiction or land status.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Fort Pierre, South Dakota (city)2,410 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Jones County, South Dakota32 mi south
- Sully County, South Dakota37 mi northeast
- Hughes County, South Dakota38 mi east
- Haakon County, South Dakota40 mi west
- Dewey County, South Dakota51 mi north
- Lyman County, South Dakota57 mi southeast
- Ziebach County, South Dakota60 mi northwest
Before using this answer on a form
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