📊 What this ranking measures
Rankings are based on academic achievement — the share of students scoring proficient or above on state reading and math assessments (PSSA 2024–25), ranked against other districts in the same state — not on spending, district size, or staffing. See full methodology →
All 15 Rated Districts in Delaware County, PA
Sorted by rating, then state percentile
| County Rank | District | District Office | Rating | State Percentile |
|---|---|---|---|---|
| #1 | Radnor Township School District | Wayne | 10/10 Excellent | 99th |
| #2 | Haverford Township School District | Havertown | 10/10 Excellent | 98th |
| #3 | Rose Tree Media School District | Media | 10/10 Excellent | 97th |
| #4 | Springfield School District | Springfield | 10/10 Excellent | 97th |
| #5 | Wallingford-Swarthmore School District | Wallingford | 10/10 Excellent | 97th |
| #6 | Garnet Valley School District | Glen Mills | 10/10 Excellent | 94th |
| #7 | Marple Newtown School District | Newtown Square | 9/10 Excellent | 84th |
| #8 | Penn-Delco School District | Aston | 6/10 Average | 54th |
| #9 | Ridley School District | Folsom | 4/10 Below Average | 36th |
| #10 | Chichester School District | Aston | 3/10 Below Average | 25th |
| #11 | Interboro School District | Prospect Park | 3/10 Below Average | 24th |
| #12 | Southeast Delco School District | Folcroft | 1/10 Poor | 9th |
| #13 | Upper Darby School District | Drexel Hill | 1/10 Poor | 7th |
| #14 | William Penn School District | Lansdowne | 1/10 Poor | 6th |
| #15 | Chester-Upland School District | Chester | 1/10 Poor | 1st |
Best School Districts in Delaware County, Pennsylvania (2026)
This page lists the 15 public school districts headquartered in Delaware County, Pennsylvania that have a SchoolDistrictFinder rating, scored using PSSA 2024–25 state assessment data. The county rank is simply their order here; the state percentile compares each district with every rated district in Pennsylvania, 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 Delaware 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 Delaware County, Pennsylvania? ▼
Among the 15 rated districts in Delaware County, Pennsylvania, the highest-rated is Radnor Township School District (Wayne), rated 10/10 (Excellent) and in the 99th percentile of Pennsylvania districts on PSSA 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 (PSSA 2024–25), percentile-ranked against all rated districts in Pennsylvania and converted to a 1–10 scale. Full methodology here.