City | Rank | County | 2026 Pop.↓ |
|---|---|---|---|
| Milford | 1 | Sussex County | 15,417 |
| Seaford | 2 | Sussex County | 9,414 |
| Georgetown | 3 | Sussex County | 8,517 |
| Millsboro | 4 | Sussex County | 8,116 |
| Laurel | 5 | Sussex County | 4,684 |
| Milton | 6 | Sussex County | 3,970 |
| Lewes | 7 | Sussex County | 3,924 |
| Selbyville | 8 | Sussex County | 3,478 |
| Ocean View | 9 | Sussex County | 3,196 |
| Bridgeville | 10 | Sussex County | 3,083 |
| Long Neck | 11 | Sussex County | 2,462 |
| Delmar | 12 | Sussex County | 2,427 |
| Millville | 13 | Sussex County | 2,207 |
| Lincoln | 14 | Sussex County | 2,017 |
| Blades | 15 | Sussex County | 1,409 |
| Rehoboth Beach | 16 | Sussex County | 1,345 |
| Greenwood | 17 | Sussex County | 1,186 |
| Bethany Beach | 18 | Sussex County | 1,135 |
| Dagsboro | 19 | Sussex County | 1,011 |
| Frankford | 20 | Sussex County | 961 |
| Ellendale | 21 | Sussex County | 608 |
| South Bethany | 22 | Sussex County | 553 |
| Dewey Beach | 23 | Sussex County | 428 |
| Fenwick Island | 24 | Sussex County | 409 |
| Bethel | 25 | Sussex County | 281 |
| Henlopen Acres | 26 | Sussex County | 163 |
| Galestown | 27 | Sussex County | 117 |
Sussex County is the county generally consideredasSouthDelaware.