| City | 2026 Pop. ↓ |
|---|---|
| Arden | 440 |
| Ardentown | 260 |
| Ardencroft | 237 |
| City | 2026 Pop. ↓ |
|---|---|
| Bear | 23,350 |
| Brookside | 15,472 |
| Bridgeville | 3,076 |
| Blades | 1,405 |
| Bellefonte | 1,261 |
| Bethany Beach | 1,146 |
| Bowers | 291 |
| Bethel | 281 |
| City | 2026 Pop. ↓ |
|---|---|
| Dover | 40,583 |
| Dover Base Housing | 2,928 |
| Delmar | 2,397 |
| Delaware City | 1,958 |
| Dagsboro | 1,045 |
| Dewey Beach | 428 |
| City | 2026 Pop. ↓ |
|---|---|
| Felton | 1,403 |
| Frederica | 1,151 |
| Frankford | 955 |
| Fenwick Island | 411 |
| Farmington | 105 |
| City | 2026 Pop. ↓ |
|---|---|
| Glasgow | 16,509 |
| Georgetown | 8,550 |
| Greenville | 3,279 |
| Greenwood | 1,187 |
| City | 2026 Pop. ↓ |
|---|---|
| Hockessin | 13,627 |
| Harrington | 4,012 |
| Highland Acres | 3,708 |
| Houston | 411 |
| Henlopen Acres | 167 |
| Hartly | 82 |
| City | 2026 Pop. ↓ |
|---|---|
| Kent Acres | 2,690 |
| Kenton | 227 |
| City | 2026 Pop. ↓ |
|---|---|
| Newark | 30,460 |
| North Star | 8,224 |
| New Castle | 5,801 |
| Newport | 909 |
| City | 2026 Pop. ↓ |
|---|---|
| Ocean View | 3,203 |
| Odessa | 366 |
| City | 2026 Pop. ↓ |
|---|---|
| Pike Creek Valley | 12,171 |
| Pike Creek | 7,020 |
| Port Penn | 587 |
| City | 2026 Pop. ↓ |
|---|---|
| Rising Sun-Lebanon | 4,381 |
| Riverview | 2,402 |
| Rehoboth Beach | 1,328 |
| Rodney Village | 1,279 |
| City | 2026 Pop. ↓ |
|---|---|
| Smyrna | 13,505 |
| Seaford | 9,437 |
| Selbyville | 3,474 |
| St. Georges | 1,925 |
| South Bethany | 550 |
| Slaughter Beach | 261 |
| City | 2026 Pop. ↓ |
|---|---|
| Townsend | 3,040 |
| City | 2026 Pop. ↓ |
|---|---|
| Viola | 147 |
| City | 2026 Pop. ↓ |
|---|---|
| Wilmington | 74,343 |
| Wilmington Manor | 8,063 |
| Wyoming | 1,953 |
| Woodside East | 1,533 |
| Woodside | 203 |