| population | |
| Borough of Mifflin | 642 |
| Borough of Mifflintown | 936 |
| Borough of Port Royal | 925 |
| Borough of Thompsontown | 697 |
| Township of Beale | |
| Township of Delaware |
 | Mifflin County Airport | ~ 24.99 km |
| University Park Airport | ~ 51.66 km |
| Penn Valley Airport | ~ 55.65 km |
| Capital City Airport | ~ 58.26 km |
| Harrisburg International Airport | ~ 65.86 km |
| William T. Piper Memorial Airport | ~ 67.24 km |
| Muir Army Air Field (Fort Indiantown Gap) Airport | ~ 71.29 km |
| Gettysburg Regional Airport | ~ 77.47 km |
| York Airport | ~ 81.73 km |
