Original Research by School Decision on Colony High
Colony High is a comprehensive four-year public high school in Ontario, a fast-growing logistics and distribution hub in the Inland Empire east of Los Angeles. The school enrolls a large student body of roughly equal size across grades nine through twelve, with a student population that is predominantly Latino, Black, and Asian, and a substantial majority of students who qualify for free or reduced-price lunch. The surrounding city is in the midst of rapid expansion, driven largely by Ontario Ranch, a massive master-planned community on the southern edge of town that will eventually include new schools, housing, and commercial space.
The most recent state assessment data available shows that across all students tested, English language arts proficiency is above the midline while math and science proficiency are both well below the midline. The school is in Chaffey Joint Union High School District, which serves multiple high schools across the region and has recently expanded Advanced Placement course offerings, including AP African American Studies, to broaden access to college-credit coursework and reach students new to AP study. State data on graduation rate, chronic absenteeism, and other outcomes was not available for this analysis, so a parent may want to speak directly with the school about college completion, attendance patterns, and whether students are progressing toward diplomas at pace.
Ontario itself presents a mixed character. The city has a historic downtown centered on Euclid Avenue, a landscaped pedestrian corridor with shops, civic buildings like City Hall and the Ovitt Family Community Library, and nearby parks, though the downtown is distinctly car-dependent despite its walkability in pockets. The newer growth is concentrated in Ontario Ranch to the south, a sprawling master-planned development with separate residential and commercial zones. Median home prices in the area are moderate relative to California, though they have softened slightly in the past year; rents are running around mid-market for the state. The local economy is anchored by Ontario International Airport, major retailers, and distribution centers for companies like UPS, Amazon, and Cardinal Health, along with the school district itself. Metrolink commuter rail serves the Ontario-East station with weekday service on the Riverside Line, and local Omnitrans bus routes provide transit, though most families rely on cars.
The data provided does not include information on the school's programs, course breadth, or special service offerings such as counseling, English learner support, or special education, so prospective families may want to reach out to the school directly to understand what pathways and supports are available to their student.
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