Colony High School is a public high school in Ontario, California, that serves students in grades 9–12. It is part of the Chaffey Joint Union High School District. The school has about 2,700 to 2,800 students and a student-teacher ratio of about 25 to 1, which helps support a large and diverse student body. Colony High School has a full academic program that includes Advanced Placement (AP) classes, career and technical education (CTE) pathways, and a wide range of electives in fields like business, technology, and the arts. Colony High School has a 25% proficiency rate in math and a strong 66% proficiency rate in reading, highlighting the school's success in English language arts while continuing to support growth in math skills. Students can also take standardized tests like the SAT to get into college. When families are looking at schools, they may use resources like the best high schools in California to compare programs across the state. Colony High School offers a wide range of educational experiences, including academic, extracurricular, and career-focused activities that help students get ready for success in the future.