| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| St. Helena Unified School District | Oakville | 8/10 Good · 77th pct | 1,121 | 4 | K–12 | 4 |
| Calistoga Joint Unified School District | Calistoga | 6/10 Average · 52nd pct | 807 | 3 | K–12 | 1 |
| Napa Valley Unified School District | American Canyon | 5/10 Average · 46th pct | 16,174 | 26 | K–12 | 4 |
| Howell Mountain Elementary School District | Angwin | 5/10 Average · 40th pct | 102 | 1 | K–8 | 1 |
| Pope Valley Union Elementary School District | Pope Valley | 2/10 Poor · 13th pct | 55 | 1 | K–8 | 1 |
How Napa County compares
Together they enroll 18,259 students across 35 schools. The largest is Napa Valley Unified School District with 16,174 students. Districts here average 5.2/10, below the California average of 5.7/10. Ratings range from 2/10 to 8/10.
School Districts in Napa County, California
Napa County has 5 public school districts covering 11 zip codes. The top-rated district in Napa County is St. Helena Unified School District (8/10). Ratings are based on the share of students proficient in reading and math on state assessments (CAASPP 2023–24), ranked against all districts in California. 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 Napa County, CA?
5 school districts serve zip codes in Napa County, CA. 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 Napa County, CA?
Of the districts serving Napa County, St. Helena Unified School District has the highest rating on this site at 8/10. That places it in the 77th percentile among California school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on California reading and math assessments, ranked against other districts in California and converted to a 1–10 scale. Percentiles compare districts within California only, never across state lines.