The combined value of ranches, farms, hunting land and other rural land and acreage for sale in Humboldt County, Iowa, recently on Land.com was $7 million. This represents approximately 1,000 acres of farms and ranches for sale in Humboldt County. Humboldt County ranks 88th out of 99 counties in Iowa for the combined amount of land currently advertised for sale. Humboldt had the most land for sale. Manufacturing and related services are the largest economic 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.