Colton High School is an American public high school in Colton, California. It is located just north of Interstate 10 at Rancho Avenue. The school currently enrolls 3314 students, which is more than its normal capacity. Colton High School opened in 1872 as the first High School of the Colton Joint Unified School District. It is one of five High Schools in the district. The school draws students from the city of Colton, as well as Grand Terrace and a small section of San Bernardino.