| City | ZIP Codes | Population |
|---|---|---|
| Bear | 1 | 44,553 |
| Bethany Beach | 1 | 2,878 |
| Bethel | 1 | 376 |
| Bridgeville | 1 | 10,610 |
| Camden Wyoming | 1 | 14,566 |
| Cheswold | 1 | 222 |
| Claymont | 1 | 16,376 |
| Clayton | 1 | 9,240 |
| Dagsboro | 1 | 7,668 |
| Delaware City | 1 | 1,984 |
| Delmar | 1 | 6,818 |
| Dover | 5 | 76,484 |
| Dover Afb | 1 | 64 |
| Ellendale | 1 | 3,109 |
| Felton | 1 | 12,600 |
| Fenwick Island | 1 | 582 |
| Frankford | 1 | 8,519 |
| Frederica | 1 | 5,497 |
| Georgetown | 1 | 19,513 |
| Greenwood | 1 | 7,524 |
| Harbeson | 1 | 2,173 |
| Harrington | 1 | 10,602 |
| Hartly | 1 | 4,972 |
| Hockessin | 1 | 17,011 |
| Houston | 1 | 1,688 |
| Kenton | 1 | 384 |
| Kirkwood | 1 | -- |
| Laurel | 1 | 15,822 |
| Lewes | 1 | 28,761 |
| Lincoln | 1 | 6,863 |
| Little Creek | 1 | -- |
| Magnolia | 1 | 12,277 |
| Marydel | 1 | 1,599 |
| Middletown | 1 | 48,954 |
| Milford | 1 | 21,394 |
| Millsboro | 1 | 32,513 |
| Millville | 1 | 2,050 |
| Milton | 1 | 15,125 |
| Montchanin | 1 | 26 |
| Nassau | 1 | -- |
| New Castle | 3 | 60,514 |
| Newark | 10 | 142,398 |
| Ocean View | 1 | 7,639 |
| Odessa | 1 | 558 |
| Port Penn | 1 | 328 |
| Rehoboth Beach | 1 | 15,043 |
| Rockland | 1 | 364 |
| Saint Georges | 1 | 173 |
| Seaford | 1 | 26,070 |
| Selbyville | 1 | 9,693 |
| Smyrna | 1 | 26,204 |
| Townsend | 1 | 14,026 |
| Viola | 1 | 541 |
| Wilmington | 27 | 218,967 |
| Winterthur | 1 | 0 |
| Woodside | 1 | 152 |
| Yorklyn | 1 | 17 |
Showing 57 cities in Delaware