| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Boulder Valley School District RE-2 | Eldorado Springs | 10/10 Excellent · 96th pct | 28,485 | 56 | PK–12 | 13 |
| St. Vrain Valley School District RE 1J | Longmont | 9/10 Excellent · 86th pct | 31,894 | 54 | PK–12 | 5 |
| Estes Park School District R-3 | Allenspark | 5/10 Average · 49th pct | 1,014 | 3 | PK–12 | 1 |
How Boulder County compares
Together they enroll 61,393 students across 113 schools. The largest is St. Vrain Valley School District RE 1J with 31,894 students. Districts here average 8.0/10, above the Colorado average of 5.6/10. Ratings range from 5/10 to 10/10.
School Districts in Boulder County, Colorado
Boulder County has 3 public school districts covering 19 zip codes. The top-rated district in Boulder County is Boulder Valley School District RE-2 (10/10). Ratings are based on the share of students proficient in reading and math on state assessments (CMAS 2025), ranked against all districts in Colorado. Directory details come from NCES CCD 2024–25.
Enter your zip code on any page to confirm your exact district assignment — district boundaries are address-specific and may not follow county or city lines.
Frequently Asked Questions
How many school districts are in Boulder County, CO?
3 school districts serve zip codes in Boulder County, CO. This page lists each one with its rating, enrollment, grade span and the zip codes it covers.
What is the best-rated school district in Boulder County, CO?
Of the districts serving Boulder County, Boulder Valley School District RE-2 has the highest rating on this site at 10/10. That places it in the 96th percentile among Colorado school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on Colorado reading and math assessments, ranked against other districts in Colorado and converted to a 1–10 scale. Percentiles compare districts within Colorado only, never across state lines.