Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Milford (city), DE | 11,190 |
| 2 | Seaford (city), DE | 7,957 |
| 3 | Georgetown (town), DE | 7,134 |
| 4 | Millsboro (town), DE | 6,863 |
| 5 | Laurel (town), DE | 3,865 |
| 6 | Lewes (city), DE | 3,303 |
| 7 | Milton (town), DE | 3,291 |
| 8 | Long Neck (CDP), DE | 3,017 |
| 9 | Selbyville (town), DE | 2,878 |
| 10 | Bridgeville (town), DE | 2,568 |
| 11 | Blades (town), DE | 1,179 |
| 12 | Rehoboth Beach (city), DE | 1,108 |
| 13 | Greenwood (town), DE | 990 |
| 14 | Lincoln (CDP), DE | 894 |
| 15 | Dagsboro (town), DE | 870 |
| 16 | Frankford (town), DE | 790 |
| 17 | Ellendale (town), DE | 487 |
| 18 | Dewey Beach (town), DE | 353 |
| 19 | Bethel (town), DE | 239 |
| 20 | Henlopen Acres (town), DE | 139 |
Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Milford (city), DE | 11,190 |
| 2 | Seaford (city), DE | 7,957 |
| 3 | Georgetown (town), DE | 7,134 |
| 4 | Millsboro (town), DE | 6,863 |
| 5 | Laurel (town), DE | 3,865 |
| 6 | Lewes (city), DE | 3,303 |
| 7 | Milton (town), DE | 3,291 |
| 8 | Long Neck (CDP), DE | 3,017 |
| 9 | Selbyville (town), DE | 2,878 |
| 10 | Bridgeville (town), DE | 2,568 |
| 11 | Delmar (town), DE | 2,027 |
| 12 | Millville (town), DE | 1,825 |
| 13 | Blades (town), DE | 1,179 |
| 14 | Rehoboth Beach (city), DE | 1,108 |
| 15 | Frederica (town), DE | 1,073 |
| 16 | Greenwood (town), DE | 990 |
| 17 | Lincoln (CDP), DE | 894 |
| 18 | Dagsboro (town), DE | 870 |
| 19 | Frankford (town), DE | 790 |
| 20 | Ellendale (town), DE | 487 |