| City | Number of Mailboxes |
|---|---|
| Hartly | 3 |
| Viola | 3 |
| Woodside | 3 |
| Felton | 4 |
| Camden Wyoming | 4 |
| Kenton | 3 |
| Dover | 36 |
| Cheswold | 3 |
| Harrington | 3 |
| Magnolia | 3 |
| Frederica | 4 |
| Clayton | 3 |
| Houston | 3 |
| Smyrna | 4 |
| Little Creek | 3 |
| Milford | 11 |
| Greenwood | 3 |
| Townsend | 3 |
| Lincoln | 4 |
| Odessa | 3 |
| Middletown | 5 |
| Delaware City | 3 |
| Port Penn | 3 |
| New Castle | 37 |
| Saint Georges | 3 |
| Wilmington | 214 |
| Bear | 8 |
| Newark | 59 |
| Kirkwood | 3 |
| Newport | 16 |
| Millsboro | 8 |
| Frankford | 3 |
| Georgetown | 8 |
| Lewes | 12 |
| Ocean View | 6 |
| Selbyville | 9 |
| Bethany Beach | 7 |
| Nassau | 4 |
| Rehoboth Beach | 11 |
| Seaford | 16 |
| Milton | 3 |
| Laurel | 5 |
| Ellendale | 3 |
| Delmar | 4 |
| Bethel | 3 |
| Bridgeville | 3 |
| Hockessin | 7 |
| Yorklyn | 3 |
| Talleyville | 29 |
| Rockland | 3 |
| Claymont | 6 |