Private School Review - Established 2003
Rivendell School Of Northern Colorado Photo
Rivendell School Of Northern Colorado

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

For the 2025-26 school year, there are 33 private schools belonging to Association of Colorado Independent Schools (ACIS) serving 9,953 students in Colorado. You can also find more schools membership associations in Colorado.
The top ranked private schools belonging to Association of Colorado Independent Schools (ACIS) in Colorado include Fountain Valley School of Colorado, Kent Denver School, and Dawson School.
The average tuition cost is $27,202, which is higher than the Colorado private school average tuition cost of $14,732.
15% of private schools belonging to Association of Colorado Independent Schools (ACIS) in Colorado are religiously affiliated (most commonly Catholic and Episcopal).

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

School
Location
Quick Facts
Aspen Academy
Aspen Academy Photo - Aspen Academy is a place where community strength and service are a priority. Students -- and parents -- create lifelong friendships.
(9)
5859 S University Blvd
Littleton, CO 80121
(303) 346-3500
Gr: NS-8 | 580 students Avg. class size: 16 students Sports: 7 | Extracurrculars: 22 Tuition & acceptance rate listed
Boulder Country Day
Boulder Country Day Photo - BCD is a proudly independent institution serving students 2 years old - 8th grade. In partnership with our outstanding faculty and committed families, we uphold the highest standard for our educational experience. Through small class sizes and innovative engagement in a supportive environment, students at BCD learn to explore their strengths and apply them to the world.
(10)
4820 Nautilus Ct N
Boulder, CO 80301
(303) 527-4931
Gr: NS-8 | 293 students Avg. class size: 16 students Sports: 5 | Extracurrculars: 7 Tuition listed
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 | 515 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
Graland Country Day School
Graland Country Day School Photo - Graland makes learning fun! With hands-on activities that challenge students to innovate, collaborate, and persevere, Graland goes to great lengths to ensure learning is a joyful, curiosity-driven adventure.
(3)
55 Clermont St
Denver, CO 80220
(303) 399-8361
Gr: PK-8 | 701 students Avg. class size: 18 students Sports: 11 | Extracurrculars: 39 Tuition listed
Montessori Academy of Colorado
Montessori Academy of Colorado Photo - MAC`s Elementary School offers an unparalleled opportunity for children to thrive by combining a progressive Montessori pedagogy, a dynamic experiential program, strong academics, social-emotional support, and a robust enrichment program. The MAC Elementary experience empowers students to reach their own personal potential and develop the confidence and capabilities to positively impact their world.
Montessori School
(16)
2500 Curtis Street
Denver, CO 80205
(303) 623-2609
Gr: NS-8 | 287 students Avg. class size: 18 students Sports: 1 | Extracurrculars: 6 Tuition & acceptance rate 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
St. Elizabeth's School
St. Elizabeth's School Photo - Our Campus
(Episcopal)
1800 N. Pontiac Street
Denver, CO 80220
(303) 322-4209
Gr: K-8 | 142 students Avg. class size: 15 students Sports: 6 | Extracurrculars: 36 Tuition listed
Aspen Country Day School
Aspen Country Day School Photo - Aspen Country Day School enjoys a beautiful forested campus on Castle Creek. Ponds and mountains provide an ideal natural environment for learning in the outdoors. The entire campus was redone and reopened in 2016 with state-of-the-art classroom buildings that inspire learning and foster creativity.
(1)
85 Country Day Way
Aspen, CO 81611
(970) 925-1909
Gr: PK-8 | 295 students Avg. class size: 14 students Sports: 8 | Extracurrculars: 3 Tuition listed
Colorado Rocky Mountain School
Colorado Rocky Mountain School Photo - Colorado Rocky Mountain School Mountain Campus
500 Holden Way
Carbondale, CO 81623
(970) 963-2562
Gr: 9-12 | 163 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: 22 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
Escuela De Guadalupe
Escuela De Guadalupe Photo - Escuela de Guadalupe is a private, dual-language, Catholic school of excellence for grades Preschool through 8th. We serve a diverse community of families from around the Denver metro area, with the goal of accepting all students who are committed to an excellent education, no matter their family's financial situation. We teach all classes in Spanish and English.
(Catholic)
(1)
660 Julian St.
Denver, CO 80204
(303) 964-0816
Gr: PK-8 | 216 students Sports: 4 | Extracurrculars: 6 Tuition listed
Evergreen Country Day School
(7)
1036 El Rancho Rd. c/o Evergreen Country Day
Evergreen, CO 80439
(303) 674-3400
Gr: NS-8 | 210 students Avg. class size: 14 students Sports: 11 | Extracurrculars: 5 Tuition & acceptance rate listed
Fountain Valley School of Colorado
Fountain Valley School of Colorado Photo - Fountain Valley School offers visual art classes in ceramics, sculpture, painting/drawing, jewelry-making (metal-smithing), photography, and film. The School's three-story Art Barn is dedicated solely to the pursuit of these fields.
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
Friends School
Alternative School
5465 Pennsylvania Ave
Boulder, CO 80303
(303) 499-1999
Gr: PK-8 | 161 students Avg. class size: 16 students
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
The Logan School for Creative Learning
The Logan School for Creative Learning Photo - The Logan School sits on a 13-acre campus with 3 buildings.
Special Program Emphasis
1005 Yosemite Street
Denver, CO 80230
(303) 340-2444
Gr: K-8 | 241 students Avg. class size: 19 students Sports: 5 | Extracurrculars: 7 Tuition listed
Mackintosh Academy Boulder
(2)
6717 S. Boulder Road
Boulder, CO 80303
(303) 554-2011
Gr: K-8 | 164 students Avg. class size: 18 students Sports: 1 Tuition & acceptance rate listed
The Mcclelland School
The Mcclelland School Photo - The McClelland School's 3rd and 4th grade students participate in activities such as a "book tasting", where they are able to review new genres of books that they may not have read before and share them with their classmates.
(1)
415 E Abriendo Ave.
Pueblo, CO 81004
(719) 543-5271
Gr: PK-8 | 86 students Avg. class size: 10 students Extracurrculars: 3 Tuition listed
Montessori School Of Denver
Montessori School Of Denver Photo - Montessori School of Denver's Cinco de Mayo Celebration. MSD Students celebrate with song, dance, and a cultural festival.
Montessori School
1460 South Holly Street
Denver, CO 80222
(303) 756-9441
Gr: NS-8 | 356 students Avg. class size: 20 students Sports: 4 | Extracurrculars: 1 Tuition & acceptance rate listed
Rivendell School Of Northern Colorado
Rivendell School Of Northern Colorado Photo
(8)
1800 E Prospect Rd
Fort Collins, CO 80525
(970) 493-9052
Gr: PK-5 | 173 students Avg. class size: 20 students Extracurrculars: 4 Tuition & acceptance rate listed
St. Anne's Episcopal School
St. Anne's Episcopal School Photo - St. Anne's sits on 7 acres in Denver, Colorado. In this photo is the heart of our campus, the amphitheater. Each Tuesday, we gather together as a preschool through grade eight community for assembly led by our eighth grade student leaders.
(Episcopal)
(1)
2701 S York Street
Denver, CO 80210
(303) 756-9481
Gr: NS-8 | 434 students Avg. class size: 22 students Sports: 7 | Extracurrculars: 5 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 & acceptance rate 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
Stanley British Primary School
Stanley British Primary School Photo
(4)
350 Quebec Street
Denver, CO 80230
(303) 360-0803
Gr: PK-8 | 464 students Avg. class size: 30 students Sports: 8 | Extracurrculars: 7 Tuition listed
Havern School
Havern School Photo - Havern offers a warm and accepting environment that allows students to become confident self-advocates.
Special Education School
(4)
4000 South Wadsworth
Littleton, CO 80123
(303) 986-4587
Gr: K-8 | 95 students Avg. class size: 10 students Sports: 1 | Extracurrculars: 16 Tuition listed
Mackintosh Academy Littleton
Mackintosh Academy Littleton Photo - Mackintosh Academy - Where Bright Minds Belong!
Special Program Emphasis
(2)
7018 S Prince St
Littleton, CO 80120
(303) 794-6222
Gr: NS-8 | 84 students Avg. class size: 13 students Extracurrculars: 4 Tuition & acceptance rate listed
Telluride Mountain School
Telluride Mountain School Photo - Winter programs are designed around snow, winter ecology, avalanche education and include a full-season, on-mountain ski and snowboard Ski P.E. program that accommodates all skill levels, from the recreational skier/snowboarder to the aspiring competitor.
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
Waldorf School On The Roaring Fork
Special Program Emphasis
16543 Old Highway 82
Carbondale, CO 81623
(970) 963-1960
Gr: PK-8 | 179 students Avg. class size: 15 students Tuition & acceptance rate 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

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