Sully County, South Dakota Genealogy Guide

Sully County, South Dakota (Map It) was created on January 08, 1873 from Potter County. The county was named for Fort Sully, itself named after General Alfred Sully. Learn More About State of South Dakota History

Sully County is bordered by Potter County (north), Hyde County (east), Hughes County (south), Stanley County (southwest), Dewey County (northwest).

Sully County Cities and Towns include Agar, Onida.

Sully County, South Dakota Courthouse Records

The Sully County Courthouse is located in Onida, South Dakota. Learn More About State of South Dakota Court, Tax, Land and Probate Records.

Please contact the each clerk's department to confirm mailing address, hours, fees and other information before visiting or requesting information because contact information sometimes changes.  The Clerk's Office DOES NOT DO RESEARCH.  The documents are available to interested parties, barring confidential issues.  Most staff will assist people in finding the materials, but it is up to the individual to do the research.

The following dates indicates what vital, land, probate, and court records are in Sully county. The date listed for each category of record is usually the earliest registration filed. The earliest date does not indicate that there are numerous records for that year and does not mean that all such events were actually registered.

  • Sully County Register of Deeds has Marriage Records from 1883  and Land Records from 1873?. The County Register of Deeds is the primary record-keeping and archival repository for county land records and for the recording & maintaining of records pertaining to that real estate, plats, deeds, mortgages & many miscellaneous documents. This office is the keeper of birth, death & marriage records, military discharge records, fictitious name filings, and various types of liens, including mechanic’s liens, state and federal tax liens.
  • Sully County Clerk of Court has Probate Records from 1873? and Court Records from 1873?.

Sully County, South Dakota Census Records

Sully County, South Dakota Vital Records

Sully County, South Dakota Resources

Sully County, South Dakota External Links