| City | 2025 Pop. ↓ |
|---|---|
| Arden | 435 |
| Ardentown | 254 |
| Ardencroft | 230 |
| City | 2025 Pop. ↓ |
|---|---|
| Bear | 23,995 |
| Brookside | 14,325 |
| Bridgeville | 2,999 |
| Blades | 1,372 |
| Bellefonte | 1,238 |
| Bethany Beach | 1,123 |
| Bowers | 291 |
| Bethel | 273 |
| City | 2025 Pop. ↓ |
|---|---|
| Dover | 40,276 |
| Dover Base Housing | 3,215 |
| Delmar | 2,334 |
| Delaware City | 1,918 |
| Dagsboro | 1,019 |
| Dewey Beach | 417 |
| City | 2025 Pop. ↓ |
|---|---|
| Felton | 1,380 |
| Frederica | 1,136 |
| Frankford | 929 |
| Fenwick Island | 398 |
| Farmington | 104 |
| City | 2025 Pop. ↓ |
|---|---|
| Glasgow | 15,681 |
| Georgetown | 8,332 |
| Greenville | 2,948 |
| Greenwood | 1,153 |
| City | 2025 Pop. ↓ |
|---|---|
| Hockessin | 13,966 |
| Highland Acres | 4,000 |
| Harrington | 3,914 |
| Houston | 404 |
| Henlopen Acres | 161 |
| Hartly | 81 |
| City | 2025 Pop. ↓ |
|---|---|
| Kent Acres | 2,182 |
| Kenton | 231 |
| City | 2025 Pop. ↓ |
|---|---|
| Newark | 29,882 |
| North Star | 8,468 |
| New Castle | 5,555 |
| Newport | 888 |
| City | 2025 Pop. ↓ |
|---|---|
| Ocean View | 3,120 |
| Odessa | 360 |
| City | 2025 Pop. ↓ |
|---|---|
| Pike Creek Valley | 11,511 |
| Pike Creek | 6,744 |
| Port Penn | 172 |
| City | 2025 Pop. ↓ |
|---|---|
| Rising Sun-Lebanon | 4,227 |
| Riverview | 2,224 |
| Rehoboth Beach | 1,292 |
| Rodney Village | 1,258 |
| City | 2025 Pop. ↓ |
|---|---|
| Smyrna | 13,491 |
| Seaford | 9,231 |
| Selbyville | 3,374 |
| St. Georges | 1,630 |
| South Bethany | 534 |
| Slaughter Beach | 255 |
| City | 2025 Pop. ↓ |
|---|---|
| Townsend | 2,890 |
| City | 2025 Pop. ↓ |
|---|---|
| Viola | 150 |
| City | 2025 Pop. ↓ |
|---|---|
| Wilmington | 72,233 |
| Wilmington Manor | 8,353 |
| Wyoming | 1,975 |
| Woodside East | 1,923 |
| Woodside | 198 |