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

Best Colorado Private High Schools Belonging to Association of Colorado Independent Schools (ACIS) (2025-26)

For the 2025-26 school year, there are 14 private high schools belonging to Association of Colorado Independent Schools (ACIS) serving 4,754 students in Colorado. You can also find more schools membership associations in Colorado.
The top ranked private high schools belonging to Association of Colorado Independent Schools (ACIS) in Colorado include The Colorado Springs School, Dawson School, and Kent Denver School.
The average tuition cost is $32,508, which is higher than the Colorado private high school average tuition cost of $16,639.
14% of private high schools belonging to Association of Colorado Independent Schools (ACIS) in Colorado are religiously affiliated (most commonly Catholic and Jewish).

Top Ranked Private High Schools Belonging to Association of Colorado Independent Schools (ACIS) in Colorado (2025-26)

School
Location
Quick Facts
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
Gr: K-12 | 477 students Avg. class size: 15 students Sports: 11 | Extracurrculars: 7 Tuition listed
Denver Academy
Denver Academy Photo - Visual Arts
Special Education School
4400 E Iliff Avenue
Denver, CO 80222
(303) 777-5161
Gr: 2-12 | 457 students Avg. class size: 12 students Sports: 11 | Extracurrculars: 11 Tuition listed
Vail Mountain School
Vail Mountain School Photo
(7)
3000 Booth Falls Road
Vail, CO 81657
(970) 476-3850
Gr: K-12 | 418 students Avg. class size: 15 students Sports: 11 Tuition listed
500 Holden Way
Carbondale, CO 81623
(970) 963-2562
Gr: 9-12 | 165 students Avg. class size: 12 students Sports: 13 | Extracurrculars: 22 Tuition listed
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.
(1)
21 Broadmoor Ave
Colorado Springs, CO 80906
(719) 434-3500
Gr: PK-12 | 336 students Avg. class size: 10 students Sports: 6 | Extracurrculars: 20 Tuition & acceptance rate listed
Crested Butte Academy
(1)
P O Box 1180
Crested Butte, CO 81224
(970) 349-1805
Gr: 8-12 | 61 students Avg. class size: 6 students Sports: 11 | Extracurrculars: 5 Tuition listed
Denver Jewish Day School
Denver Jewish Day School Photo
(Jewish)
(2)
2450 S Wabash St
Denver, CO 80231
(303) 369-0663
Gr: PK-12 | 351 students Avg. class size: 16 students Sports: 9 | Extracurrculars: 9 Tuition listed
Denver Waldorf School
Denver Waldorf School Photo - The Denver Waldorf School
Special Program Emphasis
(6)
2100 S. Pennsylvania St.
Denver, CO 80210
(303) 777-0531
Gr: PK-12 | 377 students Avg. class size: 25 students Sports: 4 Tuition & acceptance rate listed
6155 Fountain Valley School Road
Colorado Springs, CO 80911
(719) 391-5251
Gr: 9-12 | 230 students Avg. class size: 10 students Sports: 17 | Extracurrculars: 25 Tuition & acceptance rate listed
Kent Denver School
Kent Denver School Photo
4000 East Quincy Avenue
Englewood, CO 80113
(303) 770-7660
Gr: 6-12 | 784 students Avg. class size: 15 students Sports: 20 | Extracurrculars: 19 Tuition listed
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
Gr: NS-12 | 678 students Avg. class size: 16 students Sports: 15 | Extracurrculars: 10 Tuition listed
Shining Mountain Waldorf School
Shining Mountain Waldorf School Photo - Movement
Special Program Emphasis
(17)
999 Violet Avenue
Boulder, CO 80304
(303) 444-7697
Gr: PK-12 | 200 students Avg. class size: 20 students Sports: 4 | Extracurrculars: 6 Tuition & acceptance rate listed
200 San Miguel River Dr
Telluride, CO 81435
(970) 728-1969
Gr: PK-12 | 120 students Avg. class size: 8 students Sports: 4 Tuition listed
Watershed School
Watershed School Photo
Alternative School
(8)
5405 Spine Rd
Boulder, CO 80301
(303) 440-7520
Gr: 6-12 | 102 students Sports: 4 | Extracurrculars: 6 Tuition listed

Recent Articles

Financial Aid Overlooked at Two-Year Colleges: What Private School Parents Should Know
Financial Aid Overlooked at Two-Year Colleges: What Private School Parents Should Know
Parents from private schools often miss key financial aid opportunities at two-year colleges. Discover what to know in 2025 for smart planning
How to Budget Tuition: Private School vs Community College Early Years
How to Budget Tuition: Private School vs Community College Early Years
Learn how to budget and compare tuition for private school and community college during early years, with up-to-date strategies and insights for 2025.
Why Private-School Families Should Consider a Community College Start
Why Private-School Families Should Consider a Community College Start
A practical guide for private-school families exploring starting at a community college to save money, build flexibility and stay transfer-ready.