For the 2026 school year, there are 4 public charter schools serving 2,464 students in Longmont, CO.
The top-ranked public charter schools in Longmont, CO are Twin Peaks Classical 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 53% (majority Hispanic).
Best Public Charter Schools in Longmont, CO (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Twin Peaks Classical 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 | 879 students Student-teacher ratio: 15:1 Minority enrollment: 39%
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 | 725 students Student-teacher ratio: 13:1 Minority enrollment: 35%
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 | 260 students Student-teacher ratio: 12:1 Minority enrollment: 20%
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 | 600 students Student-teacher ratio: 14:1 Minority enrollment: 29%
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 Classical 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 53% (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 Classical Academy vs. Flagstaff Charter Academy, Flagstaff Charter Academy vs. St. Vrain Community Montessori School
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