The Chino Valley Unified School District is a school district in San Bernardino County, California, United States. It serves the cities of Chino, Chino Hills, and the southwestern portion of Ontario, though originally it served only Chino when it was founded in 1860. It now encompasses 88 square miles (230 km2) and serves about 32,000 students from grades kindergarten up to 12th grade. CVUSD serves four high schools, five junior high schools, twenty-one elementary schools, one continuation school, an adult school, & one Charter school.