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Where am ILOCATED

Yankton County, South Dakota

Yankton County, South Dakota, has 23,635 residents (July 2025 estimate). Its county seat is Yankton. It uses Central Time and covers 521 sq mi (1,350 km²) of land.

Sioux FallsRapid CityAberdeen
Yankton County in South Dakota
Clay CountyYanktonGayvilleIreneMission HillVolin
Yankton County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
23,635
Land area
521 sq mi (1,350 km²)
County seat or government
Yankton
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$72,821 ± $7,170
Median home value
$225,900 ± $15,221
Median rent, with utilities
$781 ± $58
Homes lived in by their owners
72.7% ± 3.3 points
County type
County
Metro or micro area
Yankton, SD micro areaCentral county
Water area
11.1 sq mi (28.7 km²)
State
South Dakota
County code (FIPS)
46135
Coordinates (central point)
43.006603, -97.388361
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 Yankton 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. 5707820,383 people
  2. 570701,469 people
  3. 570451,151 people
  4. 57037925 people
  5. 57063882 people
  6. 57031784 people
  7. 57046521 people
  8. 57072435 people
  9. 57067348 people
  10. 57040222 people

10 ZIP Code areas overlap Yankton 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.

Townships in Yankton County, largest first

  1. Utica Township831 people
  2. Volin Township309 people
  3. Jamesville Township302 people
  4. Walshtown Township290 people
  5. Gayville Township224 people
  6. Marindahl Township151 people
  7. Turkey Valley Township127 people
  8. Mission Hill Township111 people
  9. Mayfield Township104 people

People counts are American Community Survey 2020–2024 5-year estimates. All townships in South Dakota, by county

School districts in Yankton County, largest first

  1. Yankton School District 63-321,278 people
  2. Bon Homme School District 04-24,578 people
  3. Viborg Hurley School District 60-62,414 people
  4. Scotland School District 04-31,851 people
  5. Irene-Wakonda School District 13-31,767 people
  6. Menno School District 33-21,478 people
  7. Gayville-Volin School District 63-11,165 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. Yankton, South Dakota (city)15,540 people
  2. Gayville, South Dakota (town)519 people
  3. Irene, South Dakota (city)456 people
  4. Mission Hill, South Dakota (town)200 people
  5. Volin, South Dakota (town)139 people
  6. Jamesville Colony, South Dakota (CDP)101 people
  7. Lesterville, South Dakota (town)91 people
  8. Utica, South Dakota (town)68 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Clay County, South Dakota22 mi east
  2. Turner County, South Dakota24 mi northeast
  3. Bon Homme County, South Dakota25 mi west
  4. Cedar County, Nebraska29 mi south
  5. Hutchinson County, South Dakota29 mi northwest
  6. Knox County, Nebraska36 mi southwest

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.