Of 58 counties in the El Dorado State, Humboldt County ranks 13th by size (4,052 square miles). Humboldt County is in North Coast California. California's Humboldt County has around 1,000 acres of ranches for sale based on recent Land Network data. The combined market value of farms and ranches for sale here was nearly $1 million. Browse all Humboldt County ranches for sale on the Land Network to find the ranch that's right for your business or commercial needs, from the sprawling legacy ranch to unbelievable residential ranch for your second home, investment property or retirement nest egg. The most common type of land for sale by combined acreage in Humboldt County is house.