O'Brien County Map
The County of O'Brien is located in the State of Iowa. Find directions to O'Brien County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the O'Brien County population is estimated at 13,679 people. The O'Brien County time zone is Central Daylight Time which is 6 hours behind Coordinated Universal Time (UTC).
Nearby counties include Buena Vista County, Cherokee County, Clay County, Dickinson County, Lyon County, Osceola County, Plymouth County, Sioux County.
Top cities include Sheldon, Hartley, Sanborn, Paullina, Primghar