A combined approximately 1,000 acres were listed for sale in Mahaska County recently; the combined value of all Mahaska County land and rural real estate for sale was approximately $23 million. Mahaska County ranks 70th out of 99 counties in the Hawkeye State for the total number of acres of land currently advertised for sale. Of all locations in Mahaska County with land for sale, Oskaloosa featured the most land for sale. Mahaska County is the 44th biggest county (573 square miles) in Iowa. It's located in the Central Iowa region of the state.