Lyman County, South Dakota

Lyman County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF LYMAN GUS Population: 3,721 (2024) ID: 174997	County	Official County Government	Contact: AUDITOR PO BOX 38, KENNEBEC SD 57544-0038
CITY OF PRESHO GUS Population: 467 (2024) ID: 175083	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 100, PRESHO SD 57568-0100
TOWN OF OACOMA GUS Population: 392 (2024) ID: 211856	Municipal	Municipal Government Within County	Contact: FINANCE OFFICER PO BOX 129, OACOMA SD 57365-0129
TOWN OF KENNEBEC GUS Population: 285 (2024) ID: 112995	Municipal	Municipal Government Within County	Contact: FINANCE OFFICER PO BOX 61, KENNEBEC SD 57544-0061
TOWN OF RELIANCE GUS Population: 127 (2024) ID: 175084	Municipal	Municipal Government Within County	Contact: FINANCE OFFICER PO BOX 572, RELIANCE SD 57569-0572
TOWNSHIP OF VIVIAN GUS Population: 125 (2024) ID: 134720	Township	Municipal Government Within County	Contact: CLERK 24458 SD HIGHWAY 53, VIVIAN SD 57576-5300
TOWNSHIP OF OACOMA GUS Population: 81 (2024) ID: 187513	Township	Municipal Government Within County	Contact: TOWNSHIP CHAIRMAN 24270 339TH AVE, RELIANCE SD 57569-5617
TOWNSHIP OF IONA GUS Population: 65 (2024) ID: 175455	Township	Municipal Government Within County	Contact: CLERK 26510 335TH AVE, IONA SD 57533-8003
TOWNSHIP OF REX GUS Population: 23 (2024) ID: 175462	Township	Municipal Government Within County	Contact: CLERK 24304 PETERSONS RD, RELIANCE SD 57569-5509
TOWNSHIP OF PRATT GUS Population: 18 (2024) ID: 175460	Township	Municipal Government Within County	Contact: CLERK 29619 RIVER RD, PRESHO SD 57568-5703
TOWNSHIP OF BAILEY GUS Population: 12 (2024) ID: 134714	Township	Municipal Government Within County	Contact: CLERK 25300 DEER VALLEY RD, RELIANCE SD 57569-5922