| City | 2025 Pop. ↓ |
|---|---|
| Arden | 438 |
| Ardentown | 259 |
| Ardencroft | 235 |
| City | 2025 Pop. ↓ |
|---|---|
| Bear | 23,995 |
| Brookside | 14,325 |
| Bridgeville | 2,992 |
| Blades | 1,367 |
| Bellefonte | 1,255 |
| Bethany Beach | 1,114 |
| Bowers | 288 |
| Bethel | 274 |
| City | 2025 Pop. ↓ |
|---|---|
| Dover | 40,387 |
| Dover Base Housing | 3,215 |
| Delmar | 2,337 |
| Delaware City | 1,945 |
| Dagsboro | 1,016 |
| Dewey Beach | 416 |
| City | 2025 Pop. ↓ |
|---|---|
| Felton | 1,389 |
| Frederica | 1,141 |
| Frankford | 930 |
| Fenwick Island | 400 |
| Farmington | 102 |
| City | 2025 Pop. ↓ |
|---|---|
| Glasgow | 15,681 |
| Georgetown | 8,324 |
| Greenville | 2,948 |
| Greenwood | 1,155 |
| City | 2025 Pop. ↓ |
|---|---|
| Hockessin | 13,966 |
| Highland Acres | 4,000 |
| Harrington | 3,973 |
| Houston | 407 |
| Henlopen Acres | 162 |
| Hartly | 80 |
| City | 2025 Pop. ↓ |
|---|---|
| Kent Acres | 2,182 |
| Kenton | 225 |
| City | 2025 Pop. ↓ |
|---|---|
| Newark | 30,483 |
| North Star | 8,468 |
| New Castle | 5,758 |
| Newport | 909 |
| City | 2025 Pop. ↓ |
|---|---|
| Ocean View | 3,113 |
| Odessa | 366 |
| 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 | 13,415 |
| Seaford | 9,194 |
| Selbyville | 3,379 |
| St. Georges | 1,630 |
| South Bethany | 535 |
| Slaughter Beach | 254 |
| City | 2025 Pop. ↓ |
|---|---|
| Townsend | 2,990 |
| City | 2025 Pop. ↓ |
|---|---|
| Viola | 146 |
| City | 2025 Pop. ↓ |
|---|---|
| Wilmington | 73,759 |
| Wilmington Manor | 8,353 |
| Woodside East | 1,923 |
| Wyoming | 1,912 |
| Woodside | 200 |