Population10,255 (July 1, 2025 Census estimate)
A County-Seat Contest Across Several Communities
Roberts County, South DakotaSisseton anchors Roberts County, whose earlier civic history includes Travare and Wilmot. State historical resources place those changing institutions within the Lake Traverse Reservation region, making Indigenous history and the later county-government story essential but distinct parts of the area’s identity. The U.S. Census Bureau estimated 10,255 residents in Roberts County, South Dakota, on July 1, 2025. The county has approximately 1,101 square miles of land, according to the 2020 Census Gazetteer.
Roberts County at a Glance
Population10,255 (July 1, 2025 Census estimate)
County SeatSisseton
Established1883 (organized; NACo County Explorer)
Total Area, Including Water1,135.777 square miles, including water (2020 Census geography)
Area Codes605
Roberts County
Roberts County organized in 1883. Travare and Wilmot contested the early seat, and Sisseton later won an election in 1898, with the outcome confirmed after further disputes. The Lake Traverse Reservation had been established in 1867, so county formation should not be treated as the beginning of community history here. The competing seats describe a later administrative process within an already inhabited region. Both the political dispute and the reservation context are needed to avoid treating the county's story as a single beginning.
Use Sisseton as the present civic reference point and historical resources to follow the earlier seats. Seek Tribal sources for the region's Indigenous history and living communities. The changing administrative locations also matter when researching older county records or interpreting a place name. For a focused inquiry, track one place name across dated records and maps. That approach can clarify the seat changes while leaving Tribal history to sources that address its own institutions and perspectives.
What Shapes Us
Local Character
State historical resources place those changing institutions within the Lake Traverse Reservation region, making Indigenous history and the later county-government story essential but distinct parts of the area's identity.
Community History
Roberts County organized in 1883. Travare and Wilmot contested the early seat, and Sisseton later won an election in 1898, with the outcome confirmed after further disputes.
Explore Locally
Use Sisseton as the present civic reference point and historical resources to follow the earlier seats. Seek Tribal sources for the region's Indigenous history and living communities.
Roberts County
Places and perspectives from Roberts County
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Read the Story ExploreAround Roberts County
Stories from every corner of Roberts County.
Brown County
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Butte County
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Custer County
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Fall River County
Hot Springs anchors Fall River County, whose government developed during the Dakota territorial period. The county's earlier Forsythe name adds a useful historical distinction, while its separate administrative…
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Lawrence County
Deadwood anchors Lawrence County on South Dakota's western border, while Lead, Spearfish and Whitewood provide other community identities. The county's name recalls its first treasurer, and its historical…
ExploreFind the Right Local Connection
Start with the organization responsible for the service you need. Follow its official link for current requirements, office locations and availability.
Schools
Public school contacts
Selected local schools from the NCES 2024-2025 directory. Contact the school or district to confirm enrollment, attendance boundaries and current services; this is not a complete school list.
Rosholt Elementary – 02 – Elementary; grades PK-05. 202 Finley Ave, Rosholt, SD 57260. 605-537-4283.
Westside Elementary – 03 – Elementary; grades PK-04. 320 W Walnut, Sisseton, SD 57262. 605-698-7613.
Summit Elementary – 02 – Elementary; grades PK-08. 400 W Sherman Ave, Summit, SD 57266. 605-398-6211.
Tiospa Zina Tribal School – Other; grades KG-12. 2 TZ Drive, Agency Village, SD 57262. 605-698-3953.
Wilmot Elementary – 02 – Elementary; grades PK-05. 800 Ordway St, Wilmot, SD 57279. 605-938-4647.
Rosholt High School – 01 – High; grades 09-12. 202 Finley Ave, Rosholt, SD 57260. 605-537-4278.
Rosholt Middle School – 04 – Middle; grades 06-08. 202 Finley Ave, Rosholt, SD 57260. 605-537-4278.
Hospitals
Local hospital contacts
Facility contacts from the CMS Hospital General Information directory, updated July 22, 2026. Contact the facility directly to confirm current services and appointment arrangements.
Coteau Des Prairies Health Care System – Critical Access Hospitals. 205 Orchard Dr, Sisseton, SD 57262. 605-698-7647.
Libraries
Local library contacts
Locations and public phone numbers are from the IMLS FY2024 Public Libraries Survey. Call the branch to confirm current hours and services before visiting.
Sisseton Memorial Library – 305 E Maple St, Sisseton, SD 57262. 605-698-7391.
Wilmot Public Library – 602 Main Street, Wilmot, SD 57279. 605-938-5698.
Sisseton Wahpeton Community College Library – Bia Road 700, Sisseton, SD 57262. 605-698-3966.
DMV
South Dakota — Vehicle titles and registration
South Dakota — Driver license locations and hours
South Dakota — Schedule a driver license renewal appointment
South Dakota — Renew a driver license in person
South Dakota — Revenue online services including vehicle renewals
Postal Services
USPS location finder — Search by street address, city or ZIP Code for nearby post offices, collection boxes and available services.
USPS ZIP Code lookup — Find the mailing ZIP Code for a specific street address.
USPS Hold Mail — Arrange a temporary mail hold and review identity-verification requirements.
USPS change of address and forwarding — Review forwarding options and submit an address-change request through USPS.
USPS package pickup — Check pickup availability for your address and schedule eligible shipments.
Veterans
National services available to local residents
VA accredited representatives — Find help with VA claims and benefit applications.
VA health care applications — Review application options and supporting information.
VA disability claims — Find the official steps for submitting a disability claim.
GI Bill and education benefits — Review how to apply for VA education benefits.
Veteran career and employment support — Explore VA employment, training and career assistance.
Employment
National services available to local residents
USAJOBS federal employment — Search federal openings by location and occupation.
Apprenticeship Finder — Search apprenticeship opportunities by location and occupation.
My Next Move career exploration — Explore occupations, industries and career interests.
Government job-training resources — Find routes to state training programs and support for different job seekers.
Unemployment benefit guidance — Find your state program and its application and eligibility information.
Get to Know Roberts County
Useful answers for residents, visitors and anyone planning their next step.
Roberts County Questions, Answered
Explore practical details about the county and the organizations that serve it.
10,255 (July 1, 2025 Census estimate). This is a dated Census Bureau estimate, rather than a live resident count.
1,135.777 square miles, including water (2020 Census geography). The total combines land and water area.
Start with these official South Dakota resources: Vehicle titles and registration; Driver license locations and hours; Schedule a driver license renewal appointment. Choose the page for the service you need, then check its office or online instructions before making a trip. These links cover state services; they do not establish that every transaction is available at a county office.
Use USPS ZIP Code Lookup for the mailing ZIP Code of a specific street address. Use the USPS location finder to search for nearby postal facilities and available services. An address lookup is more useful for mailing than assuming the entire county shares one ZIP Code.
The VA explains how to find and appoint an accredited representative for benefit claims. Contact a representative to confirm availability before appointing them. For education benefits, use the GI Bill application guidance. These are national VA services available to eligible local residents, rather than a listing of county offices.
Search USAJOBS for federal positions and the Apprenticeship Finder for apprenticeship opportunities, using location filters to narrow the results. USAGov job-training guidance points to training programs and state resources. Check each listing for current availability, eligibility and application instructions; a search result does not guarantee an opening in the county.
Roberts County organized in 1883. Travare and Wilmot contested the early seat, and Sisseton later won an election in 1898, with the outcome confirmed after further disputes. The Lake Traverse Reservation had been established in 1867, so county formation should not be treated as the beginning of community history here. The competing seats describe a later administrative process within an already inhabited region. Both the political dispute and the reservation context are needed to avoid treating the county's story as a single beginning.
Use Sisseton as the present civic reference point and historical resources to follow the earlier seats. Seek Tribal sources for the region's Indigenous history and living communities. The changing administrative locations also matter when researching older county records or interpreting a place name. For a focused inquiry, track one place name across dated records and maps. That approach can clarify the seat changes while leaving Tribal history to sources that address its own institutions and perspectives.
The 2020 Census geography figures record 1,101.055 square miles of land and 34.722 square miles of water in Roberts County. The county’s total area includes both. These are geographic measurements for that Census vintage, not a measurement of current water levels or public recreation access.
In the Census Bureau’s 2025 estimate series, Roberts County had an estimated 10,266 residents on July 1, 2020, and 10,255 on July 1, 2025. Over that interval, the estimated population decreased by 11 residents, or about 0.1%. Both figures come from the same estimate vintage, which revises earlier years for a consistent comparison.
Sisseton is the county seat listed for Roberts County by the National Association of Counties. For an office visit, confirm the specific department’s address before traveling. NACo county profile.
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