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

Top 5 Best Boulder County Private High Schools (2025)

For the 2025 school year, there are 11 private high schools serving 1,197 students in Boulder County, CO.
The top ranked private high schools in Boulder County, CO include Dawson School, September School, and Shining Mountain Waldorf School.
The average acceptance rate is 53%, which is lower than the Colorado private high school average acceptance rate of 81%.
31% of private high schools in Boulder County, CO are religiously affiliated (most commonly Christian and Church of Christ).

Top Ranked Boulder County Private High Schools (2025)

School
Location
Grades
Students
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
Grades: K-12
| 515 students
Fusion Academy Boulder County
Alternative School
168 Centennial Parkway, Suite 100
Louisville, CO 80027
(877) 673-8893
Grades: 6-12
| n/a students
September School
September School Photo - Winter Trip in Estes Park
(1)
96 Arapahoe Ave.
Boulder, CO 80302
(303) 443-9933
Grades: 9-12
| 24 students
Shining Mountain Waldorf School
Shining Mountain Waldorf School Photo - Movement
Special Program Emphasis
(17)
999 Violet Avenue
Boulder, CO 80304
(303) 444-7697
Grades: PK-12
| 200 students
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
Grades: 9-12
| 55 students
Transitional School
Alternative School (Church of Christ)
14780 N 107th St
Longmont, CO 80504
(303) 776-6841
Grades: 6-11
| 9 students
Crossroads School
Crossroads School Photo - Crossroads 2022-2023 Graduates
Alternative School (Christian)
833 15th Ave.
Longmont, CO 80501
(303) 709-9881
Grades: 6-12
| 30 students
Hillside School
Special Education School
7415 Lookout Rd
Longmont, CO 80503
(303) 494-1468
Grades: 2-10
| 57 students
Longmont Christian School
Longmont Christian School Photo
(Christian)
(1)
1440 Collyer St
Longmont, CO 80501
(303) 776-3254
Grades: PK-12
| 129 students
Temple Grandin School
Temple Grandin School Photo - TGS Trades Classroom
Special Education School
(2)
3131 Indian Road
Boulder, CO 80301
(303) 554-7363
Grades: 6-12
| 18 students
Watershed School
Watershed School Photo
Alternative School
(8)
5405 Spine Rd
Boulder, CO 80301
(303) 440-7520
Grades: 6-12
| 102 students
[+] Show Closed Private Schools in Boulder County, Colorado

Boulder County Private Schools (Closed)

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

Frequently Asked Questions

What are the top ranked private high schools in Boulder County, CO?
The top ranked private high schools in Boulder County, CO include Dawson School, September School, and Shining Mountain Waldorf School.
How many private high schools are located in Boulderunty?
11 private high schools are located in Boulderunty.
How diverse are private high schools in Boulderunty?
Boulderunty private high schools are approximately 12% minority students, which is lower than the Colorado private school average of 24%.
What percentage of private high schools are religiously affiliated in Boulderunty?
31% of private high schools in Boulderunty are religiously affiliated (most commonly Christian and Church of Christ).
Which private high schools in Boulderunty are often viewed compared to one another?
Popular comparisons of private high schools in Boulderunty include: Transitional School vs. Crossroads School, Transitional School vs. Dawson School

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