Private School Review - Established 2003
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 Academy

Best Colorado Private Schools Belonging to No Membership Association (2026)

For the 2026 school year, there are 368 private schools belonging to No Membership Association in Colorado. You can also find more schools membership associations in Colorado.
The top-ranked private schools belonging to No Membership Association in Colorado include Belleview Christian School, Bethlehem Lutheran School, and Colorado Academy.

Top-Ranked Private Schools Belonging to No Membership Association in Colorado (2026)

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
Ave Maria Catholic School
Ave Maria Catholic School Photo - Ave Maria Campus including field, school and gym
(Catholic)
(9)
9056 East Parker Rd
Parker, CO 80138
(720) 842-5400
Gr: NS-8 | 486 students Avg. class size: 24 students Sports: 5 | Extracurrculars: 7 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.
(13)
4820 Nautilus Ct N
Boulder, CO 80301
(303) 527-4931
Gr: NS-8 | 293 students Avg. class size: 16 students Sports: 4 | 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 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 | 1,043 students Sports: 19 | Extracurrculars: 24 Tuition listed
Colorado Christian Academy
Colorado Christian Academy Photo
(Christian)
(16)
333 Inveness South Drive Ste 100
Englewood, CO 80112
(720) 672-0086
Gr: PK-8 | 229 students Avg. class size: 10 students Sports: 2 | Extracurrculars: 3 Tuition & acceptance rate 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 | 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
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 | 220 students Avg. class size: 10 students Sports: 11 | Extracurrculars: 21 Tuition listed
Front Range Christian School
Front Range Christian School Photo - FRCS Elementary students engaged in class
(Christian)
(3)
6657 W Ottawa Ave Ste A17
Littleton, CO 80128
(720) 922-3269
Gr: PK-12 | 492 students Avg. class size: 16 students Sports: 10 | Extracurrculars: 7 Tuition & acceptance rate 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.
(7)
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
International School of Denver
International School of Denver Photo
Special Program Emphasis
(10)
7701 E 1st Pl, Unit C
Denver, CO 80230
(303) 340-3647
Gr: PK-9 | 684 students Avg. class size: 13 students Sports: 7 | Extracurrculars: 32 Tuition & acceptance rate 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
Springs Adventist Academy
Springs Adventist Academy Photo - Street view from Palmer Park Blvd.
(Seventh Day Adventist)
(1)
5410 E. Palmer Park Blvd
Colorado Springs, CO 80915
(719) 597-0155
Gr: K-8 | 29 students Avg. class size: 10 students Extracurrculars: 2 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
Brightmont Academy - Broomfield
Special Program Emphasis
549 Flatiron Blvd, Suite C
Broomfield, CO 80021
(720) 961-5091
Gr: 1-12 Avg. class size: 1 student Tuition & acceptance rate listed
Fusion Academy Boulder County
Alternative School
168 Centennial Parkway, Suite 100
Louisville, CO 80027
(877) 673-8893
Gr: 6-12 Avg. class size: 1 student Tuition listed
Fusion Academy Denver - Greenwood Village
Fusion Academy Denver - Greenwood Village Photo - Each Fusion campus has a state-of-the-art music studio with professional-grade tools. Students can explore instruments, vocals, songwriting, DJ performing arts, and more.
Alternative School
5340 South Quebec Street, Suite 100 N
Englewood, CO 80111
(877) 673-8893
Gr: 6-12 Tuition listed
Humanex Academy
Humanex Academy Photo - Volunteering in the community
Special Education School
(2)
2700 S Zuni Street
Englewood, CO 80110
(303) 783-0137
Gr: 6-12 | 38 students Avg. class size: 5 students Extracurrculars: 4 Tuition & acceptance rate listed
Mountain Montessori
Montessori School
77 Metcalf Rd
Avon, CO 81620
(970) 390-3941
Gr: NS-K | 40 students Tuition listed
Abiding Hope Preschool
Daycare / Preschool (Evangelical Lutheran Church in America (formerly AELC, ALC, or LCA))
6337 S Robb Way
Littleton, CO 80127
(303) 932-9160
Gr: PK-K | 336 students Avg. class size: 15 students Tuition & acceptance rate listed
Adventist Christian School
(Seventh Day Adventist)
612 23rd Ave
Greeley, CO 80634
(970) 353-2770
Gr: K-8 | 47 students Tuition listed
All Souls Catholic School
(Catholic)
(2)
4951 S Pennsylvania St
Englewood, CO 80113
(303) 789-2155
Gr: PK-8 | 395 students
Ambleside Colorado
Ambleside Colorado Photo - Arduino Programming Project
(Christian)
(3)
9941 Lone Tree Parkway
Lone Tree, CO 80124
(720) 712-0464
Gr: K-12 | 180 students Avg. class size: 16 students Sports: 5 | Extracurrculars: 4 Tuition & acceptance rate listed
Anastasis Academy
Alternative School (Christian)
(2)
6495 S Colorado Blvd
Littleton, CO 80121
(303) 779-0358
Gr: K-8 | 59 students Avg. class size: 12 students Tuition & acceptance rate listed
Arma Dei Academy
Arma Dei Academy Photo
Special Program Emphasis (Christian)
341 E. Wildcat Reserve Parkway
Littleton, CO 80126
(303) 346-4523
Gr: PK-12 | 602 students Avg. class size: 16 students Sports: 6 | Extracurrculars: 3 Tuition listed
Ascent Christian School
Ascent Christian School Photo - Ascent Christian provides Christian education for K4, elementary, middle school, and high school students. We connect the strength of private education with the impact of family involvement by implementing three on-campus days and two at-home days. We're set apart from typical private education; focusing on the core values of worship, academics, missions, leadership, and adventure.
(Christian)
(3)
4330 Mark Dabling Blvd
Colorado Springs, CO 80907
(719) 302-3751
Gr: PK-12 | 250 students Sports: 2 | Extracurrculars: 2 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: NS-8 | 295 students Avg. class size: 14 students Sports: 8 | Extracurrculars: 3 Tuition listed
Aspen Park iMontessori
Aspen Park iMontessori Photo - Learning the Physics of Drone flying.
Montessori School
25782 Vosler Street
Conifer, CO 80433
(303) 668-1532
Gr: NS-3 | 30 students Avg. class size: 10 students Extracurrculars: 1 Tuition & acceptance rate listed
Augustine Classical Academy
Augustine Classical Academy Photo
(Christian)
(1)
480 South Kipling St.
Denver, CO 80226
(720) 446-6286
Gr: PK-12 | 266 students Sports: 5 | Extracurrculars: 3 Tuition listed
Belleview 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."
(Christian)
(4)
3455 W 83rd Ave
Westminster, CO 80031
(303) 427-5459
Gr: NS-12 | 443 students Avg. class size: 18 students Sports: 5 | Extracurrculars: 8 Tuition & acceptance rate listed
Bethlehem Lutheran School
Bethlehem Lutheran School Photo
(Lutheran Church Missouri Synod)
(3)
2100 Wadsworth Blvd
Denver, CO 80214
(303) 233-0401
Gr: NS-8 | 335 students Avg. class size: 18 students Sports: 7 | Extracurrculars: 8 Tuition & acceptance rate listed
Bishop Machebeuf High School
(Catholic)
(1)
458 Uinta Way
Denver, CO 80230
(303) 344-0082
Gr: 9-12 | 200 students Avg. class size: 20 students Sports: 11 Tuition & acceptance rate listed
Bixby School
Bixby School Photo
Alternative School
(23)
4760 Table Mesa Drive
Boulder, CO 80305
(303) 494-7508
Gr: PK-5 | 113 students Avg. class size: 8 students Sports: 1 Tuition & acceptance rate listed
Blessed Sacrament Parish School
Blessed Sacrament Parish School Photo
(Catholic)
1973 Elm Street
Denver, CO 80220
(303) 377-8835
Gr: PK-8 | 445 students Avg. class size: 21 students Sports: 8 | Extracurrculars: 6 Tuition & acceptance rate listed
Brightmont Academy - Castle Pines
858 W. Happy Canyon Rd. Ste. 170
Castle Rock, CO 80108
(720) 961-5073
Gr: 1-12 Avg. class size: 10 students Tuition & acceptance rate listed
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