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Where am ILOCATED

Hamlin County, South Dakota

Hamlin County, South Dakota, has 6,900 residents (July 2025 estimate). Its county seat is Hayti. It uses Central Time and covers 507 sq mi (1,313 km²) of land.

Sioux FallsRapid CityAberdeen
Hamlin County in South Dakota
Lake NordenEstellineCastlewoodBryantHayti
Hamlin County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
6,900
Land area
507 sq mi (1,313 km²)
County seat or government
Hayti
Time zone
Central TimeUTC-06:00 in January; UTC-05:00 in July
Median household income
$87,101 ± $2,886
Median home value
$208,600 ± $16,083
Median rent, with utilities
$800 ± $212
Homes lived in by their owners
82% ± 5.5 points
County type
County
Metro or micro area
Outside any metro or micro areaNext to: Watertown, SD micro area and Brookings, SD micro area
Water area
31 sq mi (80.3 km²)
State
South Dakota
County code (FIPS)
46057
Coordinates (central point)
44.680619, -97.178598
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 Hamlin 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. 5720126,781 people
  2. 572261,953 people
  3. 572121,819 people
  4. 572231,429 people
  5. 572341,339 people
  6. 572481,295 people
  7. 572211,158 people
  8. 57241936 people
  9. 57243549 people
  10. 57242320 people
  11. 57238315 people
  12. 57271246 people

12 ZIP Code areas overlap Hamlin 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 Hamlin County, largest first

  1. Norden Township390 people
  2. Estelline Township306 people
  3. Cleveland Township298 people
  4. Hamlin Township291 people
  5. Garfield Township199 people
  6. Castlewood Township193 people
  7. Hayti Township167 people
  8. Oxford Township167 people
  9. Florence Township139 people
  10. Dempster Township95 people
  11. Dixon Township93 people
  12. Opdahl Township84 people
All 13
  1. Brantford Township57 people

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

School districts in Hamlin County, largest first

  1. Watertown School District 14-426,696 people
  2. Hamlin School District 28-33,702 people
  3. Deuel School District 19-43,303 people
  4. Arlington School District 38-11,911 people
  5. Estelline School District 28-21,523 people
  6. Castlewood School District 28-11,486 people
  7. Waverly School District 14-5978 people
  8. Henry School District 14-2542 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. Lake Norden, South Dakota (city)889 people
  2. Estelline, South Dakota (city)831 people
  3. Castlewood, South Dakota (city)804 people
  4. Bryant, South Dakota (city)727 people
  5. Hayti, South Dakota (town)444 people
  6. Lake Poinsett, South Dakota (CDP)348 people
  7. Hazel, South Dakota (town)199 people
  8. Claremont Colony, South Dakota (CDP)0 people
  9. Poinsett Colony, South Dakota (CDP)0 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Codington County, South Dakota20 mi north
  2. Deuel County, South Dakota25 mi east
  3. Kingsbury County, South Dakota27 mi southwest
  4. Brookings County, South Dakota28 mi southeast
  5. Clark County, South Dakota29 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.