Private School Review - Established 2003
Montessori Children's House Of Denver - Mayfair Photo
Montessori Children's House Of Denver - Mayfair

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

For the 2025-26 school year, there are 40 private schools belonging to National Association of Independent Schools (NAIS) serving 13,004 students in Colorado. You can also find more schools membership associations in Colorado.
The top ranked private schools belonging to National Association of Independent Schools (NAIS) in Colorado include Colorado Academy, Fountain Valley School of Colorado, and Kent Denver School.
The average tuition cost is $27,861, which is higher than the Colorado private school average tuition cost of $14,732.
25% of private schools belonging to National Association of Independent Schools (NAIS) in Colorado are religiously affiliated (most commonly Christian and Catholic).

Top Ranked Private Schools Belonging to National Association of Independent Schools (NAIS) 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
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
Gr: PK-12 | 1,047 student Sports: 19 | Extracurrculars: 23 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
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
Bixby School
Bixby School Photo
Alternative School
(20)
4760 Table Mesa Drive
Boulder, CO 80305
(303) 494-7508
Gr: NS-5 | 127 students Avg. class size: 10 students Sports: 1 Tuition & acceptance rate 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
Colorado Springs Christian School
(Christian)
1003 Tamarac Pkwy
Woodland Park, CO 80863
(719) 686-0706
Gr: K-5 | 82 students 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
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
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
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
Gr: 11-12 | 40 students Avg. class size: 10 students Sports: 4 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
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
Regis Jesuit High School
Regis Jesuit High School Photo
Special Program Emphasis (Catholic)
(1)
6380 S Lewiston Way
Aurora, CO 80016
(303) 269-8000
Gr: 9-12 | 1,682 student Avg. class size: 21 students Sports: 21 | Extracurrculars: 3 Tuition 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
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
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
Gr: 9-12 | 55 students Tuition & acceptance rate listed
Valor Christian High School
Valor Christian High School Photo - Library
(Christian)
3775 Grace Blvd
Littleton, CO 80126
(303) 471-3000
Gr: 9-12 | 1,200 student Sports: 16 | Extracurrculars: 2 Tuition & acceptance rate listed
Beautiful Savior Lutheran School
(Other Lutheran)
6995 W. 120th Avenue
Broomfield, CO 80020
(303) 469-1785
Gr: K-6 | 40 students Avg. class size: 10 students Extracurrculars: 3 Tuition & acceptance rate listed
Eagle Rock School & Pdc
Eagle Rock School & Pdc Photo - www.eaglerockschool.org
Alternative School
2750 Notaiah Rd
Estes Park, CO 80517
(970) 586-0600
Gr: Inquire with school | 29 students
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
Montessori Children's House Of Denver - Mayfair
Montessori Children's House Of Denver - Mayfair Photo
Montessori School
1467 Birch St
Denver, CO 80220
(303) 322-8324
Gr: NS-K | 57 students Tuition listed
Primrose School Of Bear Creek
Daycare / Preschool
3395 S Kipling Pkwy
Denver, CO 80227
(303) 716-7147
Gr: NS-K | 16 students
Steamboat Mountain School
Alternative School
(1)
818 Oak St
Steamboat Springs, CO 80487
(970) 879-1350
Gr: K-12 | 154 students Avg. class size: 13 students Tuition listed
Show 5 more private schools in Colorado (out of 40 total schools)
Loading...

Recent Articles

Why Private School in 2025?
Why Private School in 2025?
Learn the key benefits of private school in 2025, from academics to values. Expert insights for parents making the right choice.
2025 Guides to Private Schools for Parents
2025 Guides to Private Schools for Parents
Discover the best 2025 private school guides, updated tuition, demographics, and expert advice for parents choosing private education.
So Many Choices: 2025 Private School Guide
So Many Choices: 2025 Private School Guide
Explore key factors in choosing a private school in 2025, from tuition to teaching styles. Get expert insights to guide your family’s decision.

Quick Links

SCHOOL SEARCH TOOLS:
SCHOOL BY TYPE (CO):
OPEN-HOUSES & JOBS:
PUBLIC & BOARDING SCHOOLS:
PRIVATE SCHOOL DATA:

Most Popular Articles

Overview of State Voucher Programs in the United States
Overview of State Voucher Programs in the United States
 A Parent’s Guide to Private School Entrance Exams
A Parent’s Guide to Private School Entrance Exams
School Rankings by Category
School Rankings by Category
 For-profit vs. Not-for-profit Schools
For-profit vs. Not-for-profit Schools
 What Is A Montessori School? 5 Facts About Montessori Schools
What Is A Montessori School? 5 Facts About Montessori Schools

More Articles

Timeless School Insights
The Journey to Enrollment
Well-Rounded Achievements
Strategic School Choices
Leadership in Private Education