Humboldt County is a large region of big mining and mineral extraction interests alongside farming and ranching. The county seat of Winnemucca has grown from an 1800s trading post for westward-bound wagon trains along the Humboldt Trail to a hub for the area?s energy and agricultural interests as well as jumping-off for numerous outdoor adventures including fishing, hunting and ATVing. There was a total of around $198 million of farms, ranches, and rural real estate for sale in Humboldt County, California, recently on Land.com. The total size of all Humboldt County land and rural real estate for sale was approximately 100,000 acres. Humboldt County ranks 24th out of 58 counties in the state for the combined amount of land currently advertised for sale. Of all farms, ranches, and rural real estate for sale in Humboldt County, Eureka had the most land for sale. Humboldt County is California's 13th largest county (4,052 square miles). It's located in the North Coast California region of California.