For the 2025-26 school year, there are 4 public charter schools serving 2,509 students in Longmont, CO.
The top ranked public charter schools in Longmont, CO are Twin Peaks Charter Academy, Flagstaff Charter Academy and St. Vrain Community Montessori School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Longmont, CO public charter schools have an average math proficiency score of 42% (versus the Colorado public charter school average of 35%), and reading proficiency score of 55% (versus the 48% statewide average). Charter schools in Longmont have an average ranking of 7/10, which is in the top 50% of Colorado public charter schools.
Minority enrollment is 33% of the student body (majority Hispanic), which is less than the Colorado public charter school average of 52% (majority Hispanic).
Best Public Charter Schools in Longmont, CO (2025-26)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Twin Peaks Charter Academy
Charter School
(Math: 48% | Reading: 56%)
Rank:
Rank:
8/
Top 30%10
340 South Sunset Street
Longmont, CO 80501
(303) 772-7286
Longmont, CO 80501
(303) 772-7286
Gr: K-12 | 852 students Student-teacher ratio: 17:1 Minority enrollment: 41%
Rank: #22.
Flagstaff Charter Academy
Charter School
(Math: 42% | Reading: 57%)
Rank:
Rank:
8/
Top 30%10
2040 Miller Drive
Longmont, CO 80501
(303) 651-7900
Longmont, CO 80501
(303) 651-7900
Gr: PK-8 | 775 students Student-teacher ratio: 13:1 Minority enrollment: 33%
Rank: #33.
St. Vrain Community Montessori School
Charter School
(Math: ≥50% | Reading: 40-59%)
Rank:
Rank:
8/
Top 30%10
1055 Delaware Ave.
Longmont, CO 80501
(303) 682-4339
Longmont, CO 80501
(303) 682-4339
Gr: PK-8 | 267 students Student-teacher ratio: 12:1 Minority enrollment: 19%
Rank: #44.
Firestone Charter Academy
Charter School
(Math: 34% | Reading: 50%)
Rank:
Rank:
7/
Top 50%10
5753 Twilight Avenue
Longmont, CO 80504
(303) 772-3711
Longmont, CO 80504
(303) 772-3711
Gr: PK-8 | 615 students Student-teacher ratio: 13:1 Minority enrollment: 28%
Longmont, Colorado Public Schools (Closed)
School
Location
Quick Facts
Adult Educationlincoln Center (Closed 2014)
Alternative School
820 Main St
Longmont, CO 80501
(303) 678-5662
Longmont, CO 80501
(303) 678-5662
Gr: 6-12 | 122 students Minority enrollment: 57%
233 East Mountain View
Longmont, CO 80501
(303) 772-7900
Longmont, CO 80501
(303) 772-7900
Gr: 6-8 | 414 students Student-teacher ratio: 14:1 Minority enrollment: 87%
333 East Mountain View
Longmont, CO 80501
(303) 772-4280
Longmont, CO 80501
(303) 772-4280
Gr: PK-5 | 380 students Student-teacher ratio: 15:1 Minority enrollment: 81%
1200 South Sunset Street
Longmont, CO 80501
(720) 494-3975
Longmont, CO 80501
(720) 494-3975
Gr: 9-12
1200 South Sunset Street
Longmont, CO 80501
(720) 494-3969
Longmont, CO 80501
(720) 494-3969
Gr: 9-12 | 50 students Student-teacher ratio: 13:1 Minority enrollment: 76%
1440 Collyer St
Longmont, CO 80501
(720) 494-3761
Longmont, CO 80501
(720) 494-3761
Gr: PK-5 | 320 students Student-teacher ratio: 12:1 Minority enrollment: 89%
Ute Creek Secondary Charter Academy (Closed 2008)
Charter School
1198 Boston Avenue
Longmont, CO 80501
(303) 774-0066
Longmont, CO 80501
(303) 774-0066
Gr: 9-12 | 169 students Student-teacher ratio: 14:1 Minority enrollment: 33%
Frequently Asked Questions
What are the top ranked public charter schools in Longmont, CO?
The top ranked public charter schools in Longmont, CO include Twin Peaks Charter Academy, Flagstaff Charter Academy and St. Vrain Community Montessori School.
How many public charter schools are located in Longmont?
4 public charter schools are located in Longmont.
What is the racial composition of students in Longmont?
Longmont public charter schools minority enrollment is 33% of the student body (majority Hispanic), which is less than the Colorado public charter schools average of 52% (majority Hispanic).
Which public charter schools in Longmont are often viewed compared to one another?
Popular comparisons of public charter schools in Longmont include: St. Vrain Community Montessori School vs. Flagstaff Charter Academy, Twin Peaks Charter Academy vs. Flagstaff Charter Academy, Flagstaff Charter Academy vs. St. Vrain Community Montessori School
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