Camarillo is a city in Ventura County in the U.S. state of California. As of the 2010 United States Census, the population was 65,201, an increase of 8,117 from the 57,084 counted in the 2000 Census. The Ventura Freeway (U.S. Route 101) is the city’s primary thoroughfare. Camarillo is named for Adolfo and Juan Camarillo, two of the few Californios (pre-1848 California natives of Hispanic ancestry) to preserve the city’s heritage after the arrival of Anglo settlers.