A total of around 1,000 acres were listed for sale in Obrien County recently; the value of all Obrien County ranches, farms, hunting land and other rural land and acreage for sale was nearly $11 million. Obrien County ranks 61st out of 99 counties in the Cyclone State for the combined amount of land currently advertised for sale. Sheldon featured the most land for sale. Its economy is defined as agricultural, with 884 farms recorded in the county during the most recent U.S. Census. Farming activities in Obrien County generate annual revenues of $14 million, the majority of which comes from livestock products. Obrien County is the 46th biggest county (573 square miles) in Iowa. It's located in the Western Iowa region of Iowa.