Watershed School Photo

Best Boulder County Private Schools (2026)

For the 2026 school year, there are 49 private schools serving 4,986 students in Boulder County, CO (there are 87 public schools, serving 45,107 public students). 10% of all K-12 students in Boulder County, CO are educated in private schools (compared to the CO state average of 8%).
The top-ranked private schools in Boulder County, CO include Friends School, Mackintosh Academy Boulder, and Boulder Country Day.
The average tuition cost is $18,141, which is higher than the Colorado private school average tuition cost of $14,541.
23% of private schools in Boulder County, CO are religiously affiliated (most commonly Christian and Catholic).

Top-Ranked Boulder County Private Schools (2026)

School
Location
Quick Facts
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.
(11)
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 | 477 students Avg. class size: 15 students Sports: 11 | Extracurrculars: 7 Tuition 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
Bixby School
Bixby School Photo
Alternative School
(22)
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
Friends School
Alternative School
5465 Pennsylvania Ave
Boulder, CO 80303
(303) 499-1999
Gr: PK-8 | 161 students Avg. class size: 16 students
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
Mt. Zion Lutheran Preschool
Mt. Zion Lutheran Preschool Photo - Mt. Zion Students
Daycare / Preschool (Lutheran Church Missouri Synod)
1680 Balsam Avenue
Boulder, CO 80304
(303) 746-3734
Gr: NS-PK | 37 students Avg. class size: 8 students Tuition & acceptance rate listed
Sacred Heart Of Jesus School
Sacred Heart Of Jesus School Photo - Sacred Heart of Jesus School educating children for nearly 120 years!
(Catholic)
(14)
1317 Mapleton Avenue
Boulder, CO 80304
(303) 447-2362
Gr: K-8 | 178 students Avg. class size: 15 students Sports: 6 | Extracurrculars: 12 Tuition listed
St. John The Baptist Catholic School
(Catholic)
(4)
350 Emery St
Longmont, CO 80501
(303) 776-8760
Gr: K-8 | 251 students
925 Grant Ave
Louisville, CO 80027
(303) 666-6220
Gr: PK-8 | 132 students Avg. class size: 15 students Sports: 4 | Extracurrculars: 16 Tuition listed
September School
September School Photo - Winter Trip in Estes Park
(1)
96 Arapahoe Ave.
Boulder, CO 80302
(303) 443-9933
Gr: 9-12 | 24 students Avg. class size: 8 students Sports: 1 | Extracurrculars: 8 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
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
Transitional School
Alternative School (Church of Christ)
14780 N 107th St
Longmont, CO 80504
(303) 776-6841
Gr: 6-11 | 9 students
Vista Ridge Academy
Vista Ridge Academy Photo
(Seventh Day Adventist)
(2)
3100 Ridge View Dr
Erie, CO 80516
(303) 828-4944
Gr: PK-8 | 86 students Avg. class size: 15 students Sports: 4 | Extracurrculars: 1 Tuition listed
Adventure Montessori Learning Center
Adventure Montessori Learning Center Photo - Each Montessori caregiver is attentive to the individual needs of each infant and is highly trained in observation skills and child development. Our nido room is also a parent community, in that parents are supported and offered parenting techniques and education. Breast feeding rooms are available for feeding or just for snuggling during those opportune times of the day. Our caregivers support and work with your whole family.
Montessori School
(7)
250 South Cherrywood Dr
Lafayette, CO 80026
(303) 665-6789
Gr: K-6 | 85 students Avg. class size: 20 students Extracurrculars: 6
The Barred Academy
The Barred Academy Photo - Neurodivergent students thrive academically, socially, and emotionally at The Barred Academy!
Special Education School
818 W South Boulder Rd
Louisville, CO 80027
(303) 551-0118
Gr: 1-8 | 25 students Avg. class size: 8 students Tuition listed
Blue Mountain Montessori
Montessori School
201 S Briggs St
Erie, CO 80516
(303) 339-0117
Gr: PK-K | 45 students
Boulder Montessori School
Montessori School
3300 Redstone Road
Boulder, CO 80305
(303) 494-5814
Gr: NS-PK | 105 students
Boulder Valley Waldorf School
Boulder Valley Waldorf School Photo - Students enjoying the playground during free play time.
Special Program Emphasis
(9)
6500 West Dry Creek Parkway
Longmont, CO 80503
(303) 652-0130
Gr: PK-8 | 144 students Avg. class size: 12 students Sports: 1 Tuition listed
Boulder Waldorf Kindergarten
Boulder Waldorf Kindergarten Photo - Last day of the school year picnic when the teachers honor each child as we head off to Summer Break!
Daycare / Preschool
(2)
4072 19th Street
Boulder, CO 80304
(303) 541-0671
Gr: NS-K | 68 students Avg. class size: 15 students Tuition & acceptance rate listed
Crossroads School
Crossroads School Photo - Crossroads 2025 graduates
Alternative School (Christian)
833 15th Ave.
Longmont, CO 80501
(303) 709-9881
Gr: 6-12 | 50 students Extracurrculars: 1 Tuition listed
Fairview Montessori School
Montessori School
1501 Jefferson Avenue
Louisville, CO 80027
(303) 661-0343
Gr: PK-K | 61 students Avg. class size: 24 students
Forest Park Montessori School
Montessori School
(2)
2687 Northpark Dr
Lafayette, CO 80026
(303) 928-9990
Gr: PK-K | 30 students Tuition listed
Gateway Montessori School
Montessori School
1500 9th Ave
Longmont, CO 80501
(303) 772-3864
Gr: NS-K | 65 students Avg. class size: 24 students Tuition listed
The Goddard School
The Goddard School Photo
Daycare / Preschool
3000 Village Vista Drive
Erie, CO 80516
(303) 828-5202
Gr: NS-K
The Goddard School
The Goddard School Photo - We are learning to care for our friends, our environment, our garden!
Daycare / Preschool
380 Centennial Parkway
Louisville, CO 80027
(720) 739-1938
Gr: NS-K | 117 students
Hillside School
Special Education School
6620 Gunpark Rd
Longmont, CO 80301
(303) 494-1468
Gr: 2-12 | 57 students Avg. class size: 4 students Tuition listed
Jarrow Montessori School
Montessori School
3900 Orange Ct
Boulder, CO 80304
(303) 443-0511
Gr: PK-6 | 183 students Avg. class size: 20 students Extracurrculars: 5 Tuition listed
KinderCare Learning Center at UCAR
Daycare / Preschool
3050 34th St
Boulder, CO 80301
(303) 443-5595
Gr: NS-PK
Longmont Christian School
Longmont Christian School Photo
(Christian)
(1)
1440 Collyer St
Longmont, CO 80501
(303) 776-3254
Gr: PK-12 | 129 students Extracurrculars: 3 Tuition listed
Longmont KinderCare
Longmont KinderCare Photo - Longmont KinderCare
Daycare / Preschool
851 Crisman Dr.
Longmont, CO 80501
(303) 651-1008
Gr: NS-PK | 94 students
Louisville KinderCare
Louisville KinderCare Photo - Exterior of the building
Daycare / Preschool
107 McCaslin Blvd
Louisville, CO 80027
(303) 666-9999
Gr: NS-PK
Louisville Montessori School
Daycare / Preschool
461 Tyler Ave
Louisville, CO 80027
(303) 665-2002
Gr: PK-K | 27 students Avg. class size: 20 students Tuition & acceptance rate listed
Make A Mess And Make Believe
Daycare / Preschool
1919 Yarmouth Ave
Boulder, CO 80304
(303) 443-8909
Gr: PK-K | 45 students Tuition listed
Show 14 more private schools in Boulder County, CO (out of 49 total schools)
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[+] Show Closed Private Schools in Boulder County, Colorado

Boulder County Private Schools (Closed)

School
Location
Quick Facts
3046 11th St
Boulder, CO 80304
(303) 443-4965
Gr: PK-K | 34 students
1818 Centennial Dr
Louisville, CO 80027
(303) 665-5511
Gr: NS-K Tuition & acceptance rate listed
1011 Dry Creek Dr
Longmont, CO 80503
(303) 682-0102
Gr: NS-K
1941 Terry St
Longmont, CO 80501
(303) 651-3780
Gr: K | 3 students
5524 Baseline Rd
Boulder, CO 80303
(303) 494-3100
Gr: PK-K | 33 students Acceptance rate listed
8979 Nelson Rd.
Longmont, CO 80503
(303) 678-9335
Gr: 6-12 | 18 students Avg. class size: 10 students Tuition & acceptance rate listed
833 15th Ave
Longmont, CO 80501
(303) 776-5677
Gr: 1-12 | 129 students
419 Main St
Lyons, CO 80540
(303) 823-9629
Gr: NS | 38 students
Our Saviors Lutheran School (Closed 2012)
(Wisconsin Evangelical Lutheran Synod)
1219 W 17th Avenue
Longmont, CO 80501
(303) 776-1688
Gr: NS-1 | 11 students Avg. class size: 3 students Tuition listed

Overview

This County (Boulder County)
This State (CO)
# Schools
53 Schools

Student Body:

# Students
4,986 Students
72,824 Students
% Average Students of Color
22%
25%

Academics and Faculty:

# Teachers
597 Teachers
6,373 Teachers
Average Student-Teacher Ratio
8:1
11:1
% Average Faculty w/Advanced Degree
52%
56%
Average Class Size
14 students
15 students
Average Number of AP Courses
16 courses
12 courses
Average SAT score
1218
(Out of 1600)
1245
Average ACT score
31
(Out of 36)
25

Tuition and Acceptance Rate:

Average Yearly Tuition Cost
$18,141
$14,541
Average Summer Program Cost
$1,625
$1,689
Average % on Financial Aid
22%
29%
Average Financial Aid Grant
$4,728
$6,121
Average Acceptance Rate
80%
84%
Average Endowment Size
$6.33 million
$30.83 million

Students by Ethnicity:

0.59
0.63
# American Indian Students
14 Students
418 Students
% American Indian Students
n/a
1%
# Asian Students
101 Students
1,638 Students
% Asian Students
2%
2%
# Hispanic Students
253 Students
6,130 Students
% Hispanic Students
5%
9%
# Black Students
141 Students
1,931 Students
% Black Students
3%
3%
# White Students
2,497 Students
33,986 Students
% White Students
52%
48%
# Hawaiian Students
n/a
67 Students
% Hawaiian Students
n/a
n/a
# Two or more races Students
n/a
n/a
% of Two or more races Students
n/a
n/a
# Others Students
1,812 Students
26,521 Students
% of Others Students
38%
37%
All Ethnic Groups

Extracurriculars and Sports:

Average Number of Extracurriculars
6 extracurriculars
7 extracurriculars
Average Number of Sports
4 sports
6 sports

Frequently Asked Questions

What are the top-ranked private schools in Boulder County, CO?
The top-ranked private schools in Boulder County, CO include Friends School, Mackintosh Academy Boulder, and Boulder Country Day.
How many private schools are located in Boulderunty?
49 private schools are located in Boulderunty.
How much do private schools cost in Boulderunty?
The average tuition cost is $18,141, which is higher than the Colorado private school average tuition cost of $14,541.
How diverse are private schools in Boulderunty?
Boulderunty private schools are approximately 22% minority students, which is lower than the Colorado private school average of 25%.
What percentage of students in Boulderunty go to private school?
10% of all K-12 students in Boulderunty are educated in private schools (compared to the CO state average of 8%).
What percentage of private schools are religiously affiliated in Boulderunty?
23% of private schools in Boulderunty are religiously affiliated (most commonly Christian and Catholic).
Which private schools in Boulderunty are often viewed compared to one another?

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