Welcome to O’Brien County
O’Brien County is uniform in shape, a perfect square, 24 miles each way. 16 townships of six square miles. Two rivers, the Little Sioux and Ocheydan. Smaller streams are Mill Creek, Waterman Creek and branches of the Floyd River. The County was named by the Iowa Legislature. It is named for an Irish Patriot, William Smith O’Brien.
Latest News & Announcements
Official 2019 City/School results The following link will take you to the official election results for the 2019 City/School Elections: Election Night ReportingRead More
The O’Brien County Courthouse will be closed Thursday & Friday Nov. 28th & 29th.Read More
The O’Brien County Board of Supervisors adopted County Ordinance No. 25, an Ordinance regulating the operations of off-highway vehicles in the county. The ordinance will be effective April 1, 2017. The full ordinance is on the web page.Read More