| Wilmington | 72,233 |
| Dover (capital) | 39,894 |
| Newark | 30,506 |
| Middletown | 25,686 |
| Smyrna | 13,945 |
| Milford | 12,704 |
| Seaford | 7,854 |
| Georgetown | 7,655 |
| Elsmere | 6,148 |
| New Castle | 5,655 |
| Millsboro | 5,153 |
| Laurel | 4,648 |
| Harrington | 3,697 |
| Camden | 3,621 |
| Clayton | 3,542 |
| Lewes | 3,451 |
| Selbyville | 2,873 |
| Bridgeville | 2,532 |
| Townsend | 2,619 |
| Greenwood | 1,080 |
| Bethel | 185 |
| Bowers | 360 |
| Dagsboro | 974 |
| Ellendale | 525 |
| Farmington | 120 |
| Felton | 1,470 |
| Frankford | 965 |
| Frederica | 840 |
| Henlopen Acres | 140 |
| Millville | 890 |
| Ocean View | 2,780 |
| Rehoboth Beach | 1,346 |
| South Bethany | 458 |