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Where am ILOCATED

Sully County, South Dakota

Sully County, South Dakota, has 1,479 residents (July 2025 estimate). Its county seat is Onida. It uses Central Time and covers 1,007 sq mi (2,607 km²) of land.

Sioux FallsRapid CityAberdeen
Sully County in South Dakota
OnidaAgarCow Creek
Sully County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
1,479
Land area
1,007 sq mi (2,607 km²)
County seat or government
Onida
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$72,578 ± $6,950
Median home value
$205,400 ± $32,262
Median rent, with utilities
$842 ± $206
Homes lived in by their owners
72.8% ± 2.3 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Pierre, SD micro area
Water area
63.5 sq mi (164 km²)
State
South Dakota
County code (FIPS)
46119
Coordinates (central point)
44.722325, -100.131399
Open this point in the location finder

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 Sully County

Time zoneLocal time and UTC offsetNext clock change
Central TimeAmerica/ChicagoUTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 5750117,326 people
  2. 574421,772 people
  3. 57564962 people
  4. 57522521 people
  5. 57536277 people
  6. 57520118 people

6 ZIP Code areas overlap Sully 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

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

School districts in Sully County, largest first

  1. Agar-Blunt-Onida School District 58-31,929 people
  2. Highmore-Harrold School District 34-21,425 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.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Onida, South Dakota (city)644 people
  2. Agar, South Dakota (town)81 people
  3. Cow Creek, South Dakota (CDP)69 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Potter County, South Dakota24 mi north
  2. Hughes County, South Dakota25 mi south
  3. Hyde County, South Dakota35 mi east
  4. Stanley County, South Dakota37 mi southwest
  5. Dewey County, South Dakota45 mi northwest

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.