O'Brien County

O'Brien County is an administrative division in northwest Iowa with a nearly square shape spanning about 24 miles on each side. Primghar serves as the county seat and handles local government services for the area's residents.

The Iowa State Legislature established the county in 1851, naming it after William Smith O'Brien, an Irish revolutionary. This creation occurred during rapid westward settlement and the formation of new administrative structures across the state.

The name honors an Irish independence leader, reflecting the heritage of settlers who came to build communities here. This Irish connection remains woven into local identity and how residents understand their place.

Visitors can access public services and administrative offices in Primghar during standard business hours. The area is accessible by car, and local facilities provide basic services for those passing through or conducting official business.

The first courthouse was a simple log structure measuring about 14 by 20 feet, where officials kept documents in their pockets rather than in filing systems. This humble start shows how rapidly local government had to adapt as the region grew.

Location: Iowa

Inception: 1851

Capital city: Primghar

Elevation above the sea: 464 m

Shares border with: Osceola County, Cherokee County, Lyon County, Sioux County, Plymouth County, Dickinson County, Clay County, Buena Vista County

Website: http://obriencounty.com

GPS coordinates: 43.08139,-95.62611

Latest update: December 10, 2025 16:01