Marion County, South Carolina

Marion 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 MARION GUS Population: 28,368 (2024) ID: 194036	County	Official County Government	Contact: COUNTY ADMINISTRATOR PO BOX 183, MARION SC 29571-0183
CITY OF MARION GUS Population: 6,068 (2024) ID: 174939	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 1190, MARION SC 29571-1190
CITY OF MULLINS GUS Population: 3,846 (2024) ID: 134453	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 408, MULLINS SC 29574-0408
TOWN OF NICHOLS GUS Population: 221 (2024) ID: 112882	Municipal	Municipal Government Within County	Contact: MAYOR BATTLE 514 MULLINS ST, NICHOLS SC 29581
TOWN OF SELLERS GUS Population: 146 (2024) ID: 174940	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 116, SELLERS SC 29592-0116