There was a total of almost $24 million of land for sale in Mahaska County, Iowa, recently on Land.com. The total acreage of all Mahaska County farms, ranches, and rural real estate for sale was nearly 2,000 acres. Mahaska County ranks 57th out of 99 counties in the Cyclone State for the total acreage of land currently advertised for sale. Of all locations in Mahaska County with farms, ranches, and rural real estate for sale, Oskaloosa featured the most land for sale. Mahaska County is Iowa's 44th largest county (573 square miles). It's located in the Central Iowa region of the state.