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For the 2026 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).