Union County, Iowa

Union 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 UNION GUS Population: 11,955 (2024) ID: 104327	County	Official County Government	Contact: UNION COUNTY AUDITOR 300 N PINE ST, CRESTON IA 50801-2400
CITY OF CRESTON GUS Population: 7,421 (2024) ID: 164582	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 449, CRESTON IA 50801-0449
CITY OF AFTON GUS Population: 864 (2024) ID: 208068	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 199, AFTON IA 50830-0199
CITY OF LORIMOR GUS Population: 377 (2024) ID: 205749	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 125, LORIMOR IA 50149-0125
CITY OF CROMWELL GUS Population: 104 (2024) ID: 208069	Municipal	Municipal Government Within County	Contact: CITY CLERK 907 BROADWAY AVE, CROMWELL IA 50842-8400
CITY OF ARISPE GUS Population: 95 (2024) ID: 204487	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 261, ARISPE IA 50831-0261
CITY OF SHANNON CITY GUS Population: 73 (2024) ID: 138243	Municipal	Municipal Government Within County	Contact: MAYOR 302 UNION ST, SHANNON CITY IA 50861-8452
CITY OF THAYER GUS Population: 48 (2024) ID: 126718	Municipal	Municipal Government Within County	Contact: CITY CLERK 2461 WARBLER AVE, THAYER IA 50254-8322