| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Cape Henlopen School District | Harbeson | 10/10 Excellent · 97th pct | 6,336 | 9 | PK–12 | 4 |
| Indian River School District | Millsboro | 8/10 Good · 78th pct | 10,799 | 16 | PK–12 | 9 |
| Delmar School District | Delmar | 7/10 Good · 66th pct | 1,427 | 3 | 5–12 | 1 |
| Seaford School District | Seaford | 6/10 Average · 53rd pct | 3,410 | 7 | PK–12 | 1 |
| Woodbridge School District | Bridgeville | 4/10 Below Average · 34th pct | 2,494 | 4 | PK–12 | 2 |
| Laurel School District | Bethel | 3/10 Below Average · 22nd pct | 2,598 | 4 | PK–12 | 2 |
| Milford School District | Ellendale | 2/10 Poor · 16th pct | 4,470 | 6 | PK–12 | 3 |
How Sussex County compares
Together they enroll 31,534 students across 49 schools. The largest is Indian River School District with 10,799 students. Districts here average 5.7/10, above the Delaware average of 5.3/10. Ratings range from 2/10 to 10/10.
School Districts in Sussex County, Delaware
Sussex County has 7 public school districts covering 22 zip codes. The top-rated district in Sussex County is Cape Henlopen 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 Sussex County, DE?
7 school districts serve zip codes in Sussex 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 Sussex County, DE?
Of the districts serving Sussex County, Cape Henlopen School District has the highest rating on this site at 10/10. That places it in the 97th 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.