Marion County, Iowa

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: 34,048 (2024) ID: 104323	County	Official County Government	Contact: MARION COUNTY AUDITOR 214 E MAIN ST, KNOXVILLE IA 50138-2545
CITY OF PELLA GUS Population: 10,965 (2024) ID: 164496	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 345, PELLA IA 50219-0345
CITY OF KNOXVILLE GUS Population: 7,440 (2024) ID: 208041	Municipal	Municipal Government Within County	Contact: CITY CLERK 305 S 3RD ST, STE 4, KNOXVILLE IA 50138-2255
CITY OF PLEASANTVILLE GUS Population: 1,696 (2024) ID: 104435	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 566, PLEASANTVILLE IA 50225-0566
CITY OF MELCHER-DALLAS GUS Population: 1,193 (2024) ID: 164495	Municipal	Municipal Government Within County	Contact: CITY CLERK 305 E D MAIN ST, MELCHER DALLAS IA 50062-7731
CITY OF BUSSEY GUS Population: 378 (2024) ID: 208040	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 190, BUSSEY IA 50044-0190
CITY OF HARVEY GUS Population: 242 (2024) ID: 104434	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 147, HARVEY IA 50119-0147
CITY OF HAMILTON GUS Population: 125 (2024) ID: 126666	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 145, HAMILTON IA 50116-0145
CITY OF SWAN GUS Population: 79 (2024) ID: 126668	Municipal	Municipal Government Within County	Contact: CITY CLERK 104 CHURCH ST, SWAN IA 50252-8611
CITY OF MARYSVILLE GUS Population: 46 (2024) ID: 126667	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 127, HAMILTON IA 50116-0127