Denver Academy Photo - Graduation

Top 10 Best Colorado Private High Schools Belonging to National Association of Independent Schools (NAIS) (2025)

For the 2025 school year, there are 19 private high schools belonging to National Association of Independent Schools (NAIS) serving 8,438 students in Colorado. You can also find more schools membership associations in Colorado.
The top ranked private high schools belonging to National Association of Independent Schools (NAIS) in Colorado include Colorado Academy, Kent Denver School, and Dawson School.
The average tuition cost is $32,073, which is higher than the Colorado private high school average tuition cost of $15,826.
26% of private high schools belonging to National Association of Independent Schools (NAIS) in Colorado are religiously affiliated (most commonly Catholic and Christian).

Top Ranked Private High Schools Belonging to National Association of Independent Schools (NAIS) in Colorado (2025)

School
Location
Grades
Students
Colorado Academy
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?".
3800 S Pierce St
Denver, CO 80235
(303) 914-2513
Grades: PK-12
| 1,034 students
Dawson School
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
(13)
10455 Dawson Drive
Lafayette, CO 80026
(303) 665-6679
Grades: K-12
| 515 students
Denver Academy
Denver Academy Photo - Visual Arts
Special Education School
4400 E Iliff Avenue
Denver, CO 80222
(303) 777-5161
Grades: 2-12
| 450 students
Vail Mountain School
Vail Mountain School Photo
(7)
3000 Booth Falls Road
Vail, CO 81657
(970) 476-3850
Grades: K-12
| 418 students
500 Holden Way
Carbondale, CO 81623
(970) 963-2562
Grades: 9-12
| 163 students
The Colorado Springs School
The Colorado Springs School Photo - The Colorado Springs School is PreK-12 college-preparatory day and international school nestled in the heart of Broadmoor.
Alternative School
(1)
21 Broadmoor Ave
Colorado Springs, CO 80906
(719) 434-3500
Grades: PK-12
| 336 students
Denver Jewish Day School
Denver Jewish Day School Photo
(Jewish)
(2)
2450 S Wabash St
Denver, CO 80231
(303) 369-0663
Grades: PK-12
| 351 students
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
Grades: 9-12
| 230 students
High Mountain Institute
High Mountain Institute Photo - Winter Ski trip in the Spring semester
Special Program Emphasis
531 County Rd 5A
Leadville, CO 80461
(719) 486-8200
Grades: 11-12
| 98 students
Kent Denver School
Kent Denver School Photo
4000 East Quincy Avenue
Englewood, CO 80113
(303) 770-7660
Grades: 6-12
| 768 students
Regis Jesuit High School
Regis Jesuit High School Photo
Special Program Emphasis (Catholic)
(1)
6380 S Lewiston Way
Aurora, CO 80016
(303) 269-8000
Grades: 9-12
| 1,682 students
St. Mary's Academy
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.
(Catholic)
(6)
4545 South University Boulevard
Englewood, CO 80113
(303) 762-8300
Grades: NS-12
| 678 students
Tara Performing Arts High School
Tara Performing Arts High School Photo - Ninth grade: History through Art in New York
Special Program Emphasis
4180 19th St
Boulder, CO 80304
(303) 410-4510
Grades: 9-12
| 55 students
Valor Christian High School
Valor Christian High School Photo - Library
(Christian)
3775 Grace Blvd
Littleton, CO 80126
(303) 471-3000
Grades: 9-12
| 1,200 students
Steamboat Mountain School
Alternative School
(1)
818 Oak St
Steamboat Springs, CO 80487
(970) 879-1350
Grades: K-12
| 154 students
200 San Miguel River Dr
Telluride, CO 81435
(970) 728-1969
Grades: PK-12
| 120 students
Temple Grandin School
Temple Grandin School Photo - TGS Trades Classroom
Special Education School
(2)
3131 Indian Road
Boulder, CO 80301
(303) 554-7363
Grades: 6-12
| 18 students
University Of Denver High School
Special Program Emphasis
2306 E. Evans Avenue
Denver, CO 80208
(303) 871-2636
Grades: 10-12
| 66 students
Watershed School
Watershed School Photo
Alternative School
(8)
5405 Spine Rd
Boulder, CO 80301
(303) 440-7520
Grades: 6-12
| 102 students

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