Roberts County, South Dakota
Roberts County, South Dakota, has 10,255 residents (July 2025 estimate). Its county seat is Sisseton. It uses Central Time and covers 1,101 sq mi (2,852 km²) of land.
- Resident population, July 2025
- 10,255
- Land area
- 1,101 sq mi (2,852 km²)
- County seat or government
- Sisseton
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $65,130 ± $2,576
- Median home value
- $154,500 ± $21,816
- Median rent, with utilities
- $658 ± $44
- Homes lived in by their owners
- 71.2% ± 2.3 points
- County type
- County
- Metro or micro area
- Outside any metro or micro areaNext to: Wahpeton, ND-MN micro area
- Water area
- 34.7 sq mi (89.9 km²)
- State
- South Dakota
- County code (FIPS)
- 46109
- Coordinates (central point)
- 45.623397, -96.947551
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 Roberts 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. |
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
- 572625,100 people
- 572524,883 people
- 572161,584 people
- 580531,409 people
- 580411,389 people
- 572731,165 people
- 572601,119 people
- 57279899 people
- 57270764 people
- 56219697 people
- 57257637 people
- 57266626 people
16 ZIP Code areas overlap Roberts 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 Roberts County, largest first
- Goodwill Township1,162 people
- Sisseton Township573 people
- Geneseo Township475 people
- Lockwood Township314 people
- Long Hollow Township291 people
- Lake Township283 people
- Harmon Township248 people
- Lawrence Township245 people
- Victor Township244 people
- Lien Township188 people
- Grant Township177 people
- Bryant Township152 people
All 30
- Spring Grove Township150 people
- Minnesota Township129 people
- Agency Township128 people
- Becker Township118 people
- White Rock Township117 people
- Ortley Township113 people
- Springdale Township104 people
- Garfield Township83 people
- Norway Township61 people
- Enterprise Township55 people
- Hart Township50 people
- Lee Township47 people
- Easter Township43 people
- Dry Wood Lake Township40 people
- Alto Township34 people
- Bossko Township31 people
- Summit Township27 people
- One Road Township8 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in South Dakota, by county
School districts in Roberts County, largest first
- Sisseton School District 54-27,604 people
- Milbank School District 25-46,601 people
- Wilmot School District 54-71,453 people
- Waubay School District 18-31,170 people
- Rosholt School District 54-41,062 people
- Big Stone City School District 25-11,054 people
- Summit School District 54-6642 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 Roberts 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.
- Sisseton, South Dakota (city)2,670 people
- Agency Village, South Dakota (CDP)980 people
- Rosholt, South Dakota (town)428 people
- Wilmot, South Dakota (city)381 people
- Summit, South Dakota (town)359 people
- New Effington, South Dakota (town)269 people
- Peever, South Dakota (town)145 people
- Long Hollow, South Dakota (CDP)128 people
- Peever Flats, South Dakota (CDP)119 people
- Claire City, South Dakota (town)107 people
- Corona, South Dakota (town)87 people
- Ortley, South Dakota (town)73 people
All 14
- White Rock, South Dakota (town)12 people
- White Rock Colony, South Dakota (CDP)0 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Traverse County, Minnesota25 mi northeast
- Big Stone County, Minnesota30 mi southeast
- Marshall County, South Dakota32 mi west
- Grant County, South Dakota32 mi south
- Day County, South Dakota36 mi southwest
- Richland County, North Dakota44 mi north
- Sargent County, North Dakota47 mi northwest
Before using this answer on a form
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