📊 What this ranking measures
Rankings are based on academic achievement — the share of students scoring proficient or above on state reading and math assessments (NJSLA 2024–25), ranked against other districts in the same state — not on spending, district size, or staffing. See full methodology →
All 9 Rated Districts in Mercer County, NJ
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | Princeton Public Schools | Princeton | 10/10 Excellent | 92nd |
| #2 | West Windsor-Plainsboro Regional School District | West Windsor | 9/10 Excellent | 87th |
| #3 | Robbinsville Township School District | Robbinsville | 9/10 Excellent | 83rd |
| #4 | Hopewell Valley Regional School District | Pennington | 9/10 Excellent | 82nd |
| #5 | Lawrence Township School District | Lawrenceville | 5/10 Average | 45th |
| #6 | East Windsor Regional School District | Hightstown | 4/10 Below Average | 36th |
| #7 | Hamilton Township School District | Hamilton | 3/10 Below Average | 22nd |
| #8 | Ewing Township School District | Ewing | 2/10 Poor | 19th |
| #9 | Trenton City School District | Trenton | 1/10 Poor | 1st |
Best School Districts in Mercer County, New Jersey (2026)
This page lists the 9 public school districts headquartered in Mercer County, New Jersey that have a SchoolDistrictFinder rating, scored using NJSLA 2024–25 state assessment data. The county rank is simply their order here; the state percentile compares each district with every rated district in New Jersey, which is how the 1–10 rating is set. Ratings are not comparable with districts in other states.
Districts are placed in the county of their NCES directory listing. A district's boundaries can cross county lines, and a home in Mercer County may be served by a district headquartered next door — search your address or zip code to confirm.
Frequently Asked Questions
What is the best-rated school district in Mercer County, New Jersey? ▼
Among the 9 rated districts in Mercer County, New Jersey, the highest-rated is Princeton Public Schools (Princeton), rated 10/10 (Excellent) and in the 92nd percentile of New Jersey districts on NJSLA 2024–25 reading and math proficiency.
How are these rankings calculated? ▼
Each district's rating comes from the share of its students scoring proficient or above on state reading and math assessments (NJSLA 2024–25), percentile-ranked against all rated districts in New Jersey and converted to a 1–10 scale. Full methodology here.