Mendocino County, California was established on February 18, 1850 and named for Antonio de Mendoza, the Viceroy of New Spain, who sent Juan Rodríguez Cabrillo to explore this coast! Mendocino is how you call a member of the Mendoza family! Its county seat is Ukiah, and its fair is held in Boonville! You might recognize Glass Beach, Skunk Train, Point Cabrillo and Arena Lighthouses, and the Chandelier Drive-Thru Tree, which are located in this county!