The value of all ranches, farms, hunting land and other rural land and acreage for sale in Humboldt County recently was approximately $6 million, representing a total of 274 acres of land for sale in Humboldt County. Humboldt County ranks 89th in the Wrestling State for the total acreage of land currently advertised for sale. Humboldt had the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Humboldt County. Humboldt County is Iowa's 85th largest county (435 square miles). It's located in the Western Iowa region of Iowa.