| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Princeton Public Schools | Princeton | 10/10 Excellent · 92nd pct | 3,817 | 6 | PK–12 | 3 |
| West Windsor-Plainsboro Regional School District | Princeton Junction | 9/10 Excellent · 87th pct | 9,027 | 10 | PK–12 | 1 |
| Robbinsville Township School District | Windsor | 9/10 Excellent · 83rd pct | 3,073 | 3 | PK–12 | 2 |
| Hopewell Valley Regional School District | Hopewell | 9/10 Excellent · 82nd pct | 3,474 | 6 | PK–12 | 3 |
| Lawrence Township School District | Lawrence Township | 5/10 Average · 45th pct | 3,711 | 7 | PK–12 | 1 |
| East Windsor Regional School District | Hightstown | 4/10 Below Average · 36th pct | 5,138 | 6 | PK–12 | 1 |
| Hamilton Township School District | Trenton | 3/10 Below Average · 22nd pct | 12,096 | 23 | PK–12 | 5 |
| Ewing Township School District | Trenton | 2/10 Poor · 19th pct | 3,545 | 5 | PK–12 | 3 |
| Trenton City School District | Trenton | 1/10 Poor · 1st pct | 14,852 | 25 | K–12 | 3 |
How Mercer County compares
Together they enroll 58,733 students across 91 schools. The largest is Trenton City School District with 14,852 students. Districts here average 5.8/10, above the New Jersey average of 5.7/10. Ratings range from 1/10 to 10/10.
School Districts in Mercer County, New Jersey
Mercer County has 9 public school districts covering 22 zip codes. The top-rated district in Mercer County is Princeton Public Schools (10/10). Ratings are based on the share of students proficient in reading and math on state assessments (NJSLA 2024–25), ranked against all districts in New Jersey. 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 Mercer County, NJ?
9 school districts serve zip codes in Mercer County, NJ. 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 Mercer County, NJ?
Of the districts serving Mercer County, Princeton Public Schools has the highest rating on this site at 10/10. That places it in the 92nd percentile among New Jersey school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on New Jersey reading and math assessments, ranked against other districts in New Jersey and converted to a 1–10 scale. Percentiles compare districts within New Jersey only, never across state lines.