Lyman County is named for Major P W Lyman, who was the first settler of Yankton County and territorial legislator in 1873.
Surrounding County Courthouses:
N – Stanley County, Hughes County and Hyde County
E – Buffalo County and Brule County
S – Gregory County, Tripp County and Mellette County
W – Jones County
Created: January 8, 1873 
County Seat:
Oacoma 1893 – 1922
Kennebec 1922 – present
County Courthouse – Kennebec
Location: 300 South Main Street / 2nd Street
Built: 1925 – 1926
Style: Classical Revival
Architect: Chynoweth, Rettinghouse, Perkins & McWayne of Sioux Falls
Contractor: H P Little
Description: The building faces north and is a stately rectangular three story cream colored stone, buff colored brick and concrete structure. The building is located on spacious landscaped grounds in the center of Kennebec. On the north front there is a projecting center section with cream colored stone trim with small balustrade rails on the second story and arched windows on third story. There is a projecting cornice running below the flat roof line. The windows was remodeled in 1985 and renovations were done in 1993.
See: The 6th Judicial Circuit includes Bennett County, Gregory County, Haakon County, Hughes County, Hyde County, Jackson County, Jones County, Lyman County, Mellette County, Potter County, Stanley County, Sully County, Todd County and Tripp County.
History: The county was created in 1873 and Oacoma was selected as the county seat in 1893 when the county was organized. The first courthouse was built in Oacoma in 1894. The courthouse burned. The county seat was moved to Kennebec in 1922. The second and present courthouse was constructed in 1925 to 1926.
County Courthouse – Kennebec
County Circuit Court courtroom
Commissioner Minutes – Contractor
Pictures taken 2007, 2010 and 2011