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allk12 · Rankings · Largest charters · Colorado · Boulder County

The largest public charter schools in Boulder County, Colorado

Across Boulder County, Colorado, 6 public schools are ranked here, ranked by total enrollment among charter schools. Flagstaff Charter Academy leads the list at 725, against a median of 309 across the ranked schools.

The table below is sortable and filterable, and the full list downloads as a CSV. Figures come from federal NCES enrollment data and, where applicable, state assessment results for 2024-25.

Schools ranked
6
Boulder County, Colorado
Top Students
725
Median Students
309
LARGEST CHARTERS · BOULDER COUNTY, COLORADO
#SchoolCityDistrictLevelStudents
1Flagstaff Charter AcademyLONGMONT, COSt. Vrain Valley School District No. Re1JElementary725
2Summit Middle Charter SchoolBOULDER, COBoulder Valley School District No. Re2Middle366
3Horizons K-8 SchoolBOULDER, COBoulder Valley School District No. Re2Elementary358
4St. Vrain Community Montessori SchoolLONGMONT, COSt. Vrain Valley School District No. Re1JElementary260
5Boulder Prep Charter High SchoolBOULDER, COBoulder Valley School District No. Re2High114
6Justice High Charter SchoolLAFAYETTE, COBoulder Valley School District No. Re2High108
Page 1 of 1 · top 6 of 6 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

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DATA NOTICE

allk12 is independent and not affiliated with, endorsed by, or sponsored by NCES, the US Census Bureau, any state education agency or assessment program, or any other government agency. Source data is compiled from public records and provided "as is," without warranty of accuracy or completeness. You rely on it, and any analysis derived from it, at your own risk. See the full disclaimer.