| population | |
| City of Delaware City | 1695 |
| City of New Castle | 5285 |
| City of Newark | 31454 |
| City of Wilmington | 70851 |
| Town of Bellefonte | 1193 |
| population | |
| Town of Elsmere | 6131 |
| Town of Middletown | 18871 |
| Town of Newport | 1055 |
| Town of Odessa | 364 |
| Town of Townsend | 2049 |
| population | |
| Village of Arden | 439 |
| Village of Ardencroft | 231 |
| Village of Ardentown | 264 |
 | New Castle Airport | ~ 11.50 km |
| Philadelphia Seaplane Base | ~ 42.62 km |
| Phillips Army Air Field | ~ 47.12 km |
| Philadelphia International Airport | ~ 47.15 km |
| Chester County G O Carlson Airport | ~ 48.58 km |
| Dover Air Force Base | ~ 52.08 km |
| Millville Municipal Airport | ~ 53.99 km |
| Wings Field | ~ 69.89 km |
| Martin State Airport | ~ 72.21 km |
