Fort Thompson, SD Public Records
Fort Thompson is an unincorporated community (a census-designated place) in Buffalo County, South Dakota, with an estimated population of 1,147 (U.S. Census Bureau, 2020–2024 American Community Survey) and 10.4 square miles of land.
🏢 Local Government for Fort Thompson
Fort Thompson is not an incorporated city or town, so it has no city hall, town clerk or local government of its own. Local government services and records for Fort Thompson come from Buffalo County and from the township or town government whose territory includes it. Birth and death certificates, marriage records, deeds and court files come from the county and state offices below.
Population figure: U.S. Census Bureau, 2020–2024 American Community Survey 5-year estimate for the Fort Thompson census-designated place (a statistical area, not a government).
↑ Back to record types🏛️ County Courthouse & Records Office for Fort Thompson
Fort Thompson is in Buffalo County. In South Dakota, deeds, mortgages and other land records are recorded by the county Register of Deeds. Divorce cases in South Dakota are heard by the Circuit Court in each county. Wills and estates in South Dakota are handled by the Circuit Court in each county.
📍 Buffalo County at a Glance
| County | Buffalo County |
| County population (2024 est.) | 1,825 Source: www2.census.gov ↗ |
⚖️ Buffalo County Clerk of Court
| Address | 300 South Courtland Street, Suite #111, Chamberlain, SD 57325-1599 |
| Directions | Get directions ↗ |
| Phone | (605) 734-4580 |
| Hours | 8:00 a.m. to noon and 1:00 p.m. to 5:00 p.m., Monday through Friday |
| Records available | South Dakota Circuit Court and magistrate court case records for the county (civil, criminal, divorce, probate, small claims) |
| Good to know | This county is served by the Brule County Clerk of Court. |
| Official website | Not stated |
| Sources | ujs.sd.gov/…/buffalo-county ↗ |
| Last verified | October 17, 2026 |
See the full Buffalo County records page →
↑ Back to record types📋 Where to Get Records for Fort Thompson
Where to get the most-requested public records for people and property in Fort Thompson, SD:
📋 Fort Thompson Records Guide
| Birth & death certificates | South Dakota Department of Health – Vital RecordsCertified birth and death certificates for South Dakota are issued by the state vital records office; in some places a county or local office can also issue copies. |
| Deeds & property records | In South Dakota, deeds, mortgages and other land records are recorded by the county Register of Deeds. |
| Court cases & divorce | Buffalo County courthouse. Divorce cases in South Dakota are heard by the Circuit Court in each county. |
| Wills & estates | Wills and estates in South Dakota are handled by the Circuit Court in each county. |
| State court system | South Dakota Unified Judicial System |
| Sex offender registry | South Dakota Sex Offender Registry |