O'Brien County, Iowa

O'Brien 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 O'BRIEN GUS Population: 14,260 (2024) ID: 211245	County	Official County Government	Contact: CHAIRMAN PO BOX 380, PRIMGHAR IA 51245
CITY OF SHELDON GUS Population: 5,584 (2024) ID: 126682	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 276, SHELDON IA 51201-0276
CITY OF HARTLEY GUS Population: 1,584 (2024) ID: 164517	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 11 S CENTRAL AVE, HARTLEY IA 51346-1445
CITY OF SANBORN GUS Population: 1,463 (2024) ID: 211328	Municipal	Municipal Government Within County	Contact: MAYOR PO BOX 548, SANBORN IA 51248-0548
CITY OF PAULLINA GUS Population: 979 (2024) ID: 204479	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 239, PAULLINA IA 51046-0239
CITY OF PRIMGHAR GUS Population: 893 (2024) ID: 164519	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 39, PRIMGHAR IA 51245-0039
CITY OF SUTHERLAND GUS Population: 628 (2024) ID: 104445	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 8, SUTHERLAND IA 51058-0008
CITY OF CALUMET GUS Population: 144 (2024) ID: 104443	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 131, CALUMET IA 51009-0131
CITY OF ARCHER GUS Population: 116 (2024) ID: 211718	Municipal	Municipal Government Within County	Contact: MAYOR 207 HARRIMAN AVE, ARCHER IA 51231