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Oldest Private High Schools in Colorado

The average private high school in Colorado was founded around 1977 (2025).

The oldest private high school in Colorado is St. Mary's Academy, founded in 1864.

Front Range Christian School Photo - FRCS is a discipleship school. The goal is to grow the roots deeper for students to know who Christ is and who He created them to be. All students, grades K-12, participate in weekly chapel services.

Colorado Academy Photo - Every day on campus, CA's lives the mission to create curious, kind, courageous, and adventurous learners and leaders. Our dedicated teachers offer an innovative and rigorous curriculum rooted in the liberal arts and sciences. We do it with innovation and creativity and by encouraging students to think outside the box. We want students to ask "why?" and "why not?".

Fusion Academy Denver - Greenwood Village Photo - Classes at Fusion are one-to-one: one student and one teacher per classroom. Students have different teachers for different subjects, and teachers act as mentors in the one-to-one setting.

Dawson School Photo - Dawson School sits on a beautiful 107-acre campus, serving families from Boulder, Longmont, Broomfield, Erie, Lafayette, Louisville, and the surrounding area

St. Mary's Academy Photo - St. Mary's Academy High School excels at preparing young women for leadership in a global society. Our goal is to empower our students through the development of analytical skills, confidence, and generosity to make a difference in the world around them.

St. Mary's High School Photo - Mens' Athletics

Mile High Academy Photo - Hands-on learning for all grades

Brighton Adventist Academy Photo - BAA student participating in local music festival. BAA offers art, drama, band, choir, violin, ukulele and private lessons.

Denver Christian School Photo - Every day is an open house at Denver Christian School.We look forward to providing a personal tour to share what DCS has to offer your students & family.Please join us this summer, starting June 9 on Sundays 2-4 pm and Wednesdays 6-8 pm, to preview our school and learn more about Denver Christian School.

Belleview Christian School Photo - As a college preparatory school, our standards at Belleview Christian School are high. Specials include Art, Music (Band, Choir, and Strings), Theatre, PE, Chapel, Spanish, Computer, and more depending upon the students grade level. We strive for, as one parent put it: "An education founded on God`s precepts, focused on God`s glory."

Fountain Valley School of Colorado Photo - Fountain Valley dorms can accommodate two to three occupants, and each house includes a communal kitchen and common space, fireplace, and patio.

Mullen High School Photo - Class of 2024 shows off their future college gear during Lasallian Heritage Week.

Colorado Rocky Mountain School Photo - Colorado Rocky Mountain School Mountain Campus

Lutheran High School Photo - Our community is supportive; your student will be surrounded by teachers who care.

Year Founded Range: 1864 1975 Avg. Year Founded: 1942

Frequently Asked Questions

What is the Colorado average private high schools founding year?

The Colorado average private high schools founding year is 1977 for 2025.

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, Regis Jesuit High School and St. Mary's High School.

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