| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Appoquinimink School District | Middletown | 10/10 Excellent · 91st pct | 12,804 | 20 | PK–12 | 3 |
| Red Clay Consolidated School District | Hockessin | 8/10 Good · 72nd pct | 14,771 | 28 | PK–12 | 9 |
| Brandywine School District | Claymont | 6/10 Average · 59th pct | 10,367 | 17 | PK–12 | 6 |
| Christina School District | Newark | 3/10 Below Average · 28th pct | 13,092 | 28 | PK–12 | 6 |
| Colonial School District | Bear | 1/10 Poor · 3rd pct | 9,132 | 15 | PK–12 | 5 |
How New Castle County compares
Together they enroll 60,166 students across 108 schools. The largest is Red Clay Consolidated School District with 14,771 students. Districts here average 5.6/10, above the Delaware average of 5.3/10. Ratings range from 1/10 to 10/10.
School Districts in New Castle County, Delaware
New Castle County has 5 public school districts covering 29 zip codes. The top-rated district in New Castle County is Appoquinimink School District (10/10). Ratings are based on the share of students proficient in reading and math on state assessments (NCES EDFacts, 2021–22 for most districts), ranked against all districts in Delaware. 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 New Castle County, DE?
5 school districts serve zip codes in New Castle County, DE. 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 New Castle County, DE?
Of the districts serving New Castle County, Appoquinimink School District has the highest rating on this site at 10/10. That places it in the 91st percentile among Delaware school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on Delaware reading and math assessments, ranked against other districts in Delaware and converted to a 1–10 scale. Percentiles compare districts within Delaware only, never across state lines.