The value of all farms, ranches, and rural real estate for sale in Mahaska County, Iowa, recently was around $23 million, representing a combined 969 acres of land for sale in Mahaska County. Mahaska County ranks 72nd in Iowa for the total acreage of land currently advertised for sale. Of all locations in Mahaska County with ranches, farms, hunting land and other rural land and acreage for sale, Oskaloosa had the most land for sale. Mahaska County is Iowa's 44th biggest county (573 square miles). It's located in the Central Iowa region of Iowa.