| Rank | City | Percentage with High School Diploma |
|---|---|---|
| 1 | North Star, Delaware | 98.9% |
| 2 | Hockessin, Delaware | 97.2% |
| 3 | Pike Creek, Delaware | 96.0% |
| 4 | Pike Creek Valley, Delaware | 95.4% |
| 5 | Glasgow, Delaware | 95.1% |
| 6 | Newark, Delaware | 94.2% |
| 7 | Middletown, Delaware | 94.0% |
| 8 | Edgemoor, Delaware | 91.2% |
| 9 | Claymont, Delaware | 89.7% |
| 10 | New Castle, Delaware | 87.3% |
| 11 | Smyrna, Delaware | 87.1% |
| 12 | Bear, Delaware | 86.4% |
| 13 | Brookside, Delaware | 86.3% |
| 14 | Dover, Delaware | 85.7% |
| 15 | Milford, Delaware | 83.6% |
| 16 | Wilmington, Delaware | 81.4% |
| 17 | Seaford, Delaware | 80.1% |
| 18 | Elsmere, Delaware | 79.2% |
| 19 | Wilmington Manor, Delaware | 73.0% |
| 20 | Georgetown, Delaware | 67.1% |
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