28 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 17202 | Chambersburg | 32,665 |
| 17268 | Waynesboro | 28,887 |
| 17201 | Chambersburg | 27,148 |
| 17225 | Greencastle | 20,935 |
| 17222 | Fayetteville | 10,676 |
| 17236 | Mercersburg | 8,316 |
| 17252 | Saint Thomas | 3,661 |
| 17244 | Orrstown | 2,170 |
| 17224 | Fort Loudon | 1,735 |
| 17237 | Mont Alto | 1,726 |
| 17214 | Blue Ridge Summit | 1,189 |
| 17263 | State Line | 932 |
| 17235 | Marion | 855 |
| 17262 | Spring Run | 834 |
| 17246 | Pleasant Hall | 601 |
| 17254 | Scotland | 531 |
| 17221 | Fannettsburg | 511 |
| 17219 | Doylesburg | 506 |
| 17247 | Quincy | 471 |
| 17271 | Willow Hill | 461 |
| 17220 | Dry Run | 393 |
| 17265 | Upperstrasburg | 353 |
| 17217 | Concord | 136 |
| 17210 | Amberson | 119 |
| 17250 | Rouzerville | 78 |
| 17261 | South Mountain | 47 |
| 17232 | Lurgan | 36 |
| 17251 | Roxbury | 35 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Franklin County, Pennsylvania (US Census).