The value of all land for sale in Calhoun County recently was $129 million, representing a combined 3,030 acres of land for sale in Calhoun County. Calhoun County ranks 18th out of 83 counties in the Mitten State for the total acreage of land currently advertised for sale. Battle Creek had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Calhoun County. Calhoun County is Michigan's 45th largest county (718 square miles). It's located in the Southwest Michigan region of the state.