For the 2026-27 school year, there are 3 public charter schools serving 838 students in Boulder, CO. The top-ranked public charter schools in Boulder, CO are Summit Middle Charter School and Horizons K-8 School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Boulder, CO public charter schools have an average math proficiency score of 75% (versus the Colorado public charter school average of 35%), and reading proficiency score of 81% (versus the 48% statewide average). Charter schools in Boulder have an average ranking of 10/10, which is in the top 5% of Colorado public charter schools.
Minority enrollment is 29% of the student body (majority Hispanic), which is less than the Colorado public charter school average of 53% (majority Hispanic).
Best Public Charter Schools in Boulder, CO (2026-27)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Summit Middle Charter School
Charter School
(Math: 88% | Reading: 91%)
Rank:
Rank:
10/
Top 1%10
4655 Hanover Avenue
Boulder, CO 80305
(720) 561-3900
Boulder, CO 80305
(720) 561-3900
Gr: 6-8 | 366 students Student-teacher ratio: 17:1 Minority enrollment: 36%
Rank: #22.
Horizons K-8 School
Alternative School
Charter School
Charter School
(Math: 53% | Reading: 65%)
Rank:
Rank:
9/
Top 20%10
4545 Sioux Drive
Boulder, CO 80303
(720) 561-5580
Boulder, CO 80303
(720) 561-5580
Gr: K-8 | 358 students Student-teacher ratio: 14:1 Minority enrollment: 17%
Rank: n/an/a
Boulder Prep Charter High School
Alternative School
Charter School
Charter School
5075 Chaparral Court #1
Boulder, CO 80301
(303) 545-6186
Boulder, CO 80301
(303) 545-6186
Gr: 9-12 | 114 students Student-teacher ratio: 10:1 Minority enrollment: 43%
Boulder, Colorado Public Schools (Closed)
School
Location
Quick Facts
700 20th Street
Boulder, CO 80302
(303) 443-1062
Boulder, CO 80302
(303) 443-1062
Gr: 6-8 | 416 students Student-teacher ratio: 16:1 Minority enrollment: 31%
7690 East Baseline Rd
Boulder, CO 80303
(720) 561-5500
Boulder, CO 80303
(720) 561-5500
Gr: K-12 | 11 students Student-teacher ratio: 11:1 Minority enrollment: 27%
Halcyon School (Special Education) (Closed 2023)
Special Education School
3100 Bucknell Court
Boulder, CO 80303
(720) 561-4700
Boulder, CO 80303
(720) 561-4700
Gr: 6-12 | 13 students Student-teacher ratio: 3:1 Minority enrollment: 23%
840 Mapleton Avenue
Boulder, CO 80304
(303) 442-6962
Boulder, CO 80304
(303) 442-6962
Gr: K-5 | 128 students Minority enrollment: 9%
Sojourner Charter School (Closed 2004)
Charter School
3050 34th Street
Boulder, CO 80301
(303) 494-9210
Boulder, CO 80301
(303) 494-9210
Gr: 6-8 | 34 students Minority enrollment: 59%
1215 Cedar Avenue
Boulder, CO 80304
(303) 449-6618
Boulder, CO 80304
(303) 449-6618
Gr: K-5 | 285 students Student-teacher ratio: 18:1 Minority enrollment: 68%
Frequently Asked Questions
What are the top-ranked public charter schools in Boulder, CO?
The top-ranked public charter schools in Boulder, CO include Summit Middle Charter School and Horizons K-8 School. Boulder has one of the highest concentrations of top-ranked public schools in Colorado.
How many public charter schools are located in Boulder?
3 public charter schools are located in Boulder.
What is the racial composition of students in Boulder?
Boulder public charter schools minority enrollment is 29% of the student body (majority Hispanic), which is less than the Colorado public charter schools average of 53% (majority Hispanic).
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