Regis Jesuit High School Top 3 · Most AP Courses (CO)

The Colorado Springs School Top 8 · Highest Avg. SAT Score (CO)

Fountain Valley School of Colorado Top 3 · Largest Endowment (CO)

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Oldest Private High Schools in Colorado

The average private high school in Colorado was founded around 1977 (2026-27).

The oldest private high school in Colorado is University Of Denver High School and St. Mary's Academy, each founded in 1864.

Quick Facts (26-27)

# CO Schools Ranked: 103
Top 20 Range (Year Founded): 1864–1958
CO School Avg.: 1975
National School Avg.: 1967

Quick Facts (26-27)

# CO Schools Ranked: 103
Top 20 Range (Year Founded): 1864–1958
CO School Avg.: 1975
National School Avg.: 1967

Frequently Asked Questions

What is the Colorado average private high schools founding year?

The Colorado average private high schools founding year is 1977 for 2026-27.

What are the private high schools with oldest founding year in Colorado?

The top ranked private high schools in Colorado include St. Mary's Academy, University Of Denver High School and Regis Jesuit High School.

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