28 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 17202 | Chambersburg | 33,566 |
| 17268 | Waynesboro | 29,362 |
| 17201 | Chambersburg | 27,554 |
| 17225 | Greencastle | 20,347 |
| 17222 | Fayetteville | 10,550 |
| 17236 | Mercersburg | 8,845 |
| 17252 | Saint Thomas | 4,038 |
| 17244 | Orrstown | 2,263 |
| 17237 | Mont Alto | 1,759 |
| 17224 | Fort Loudon | 1,603 |
| 17214 | Blue Ridge Summit | 1,143 |
| 17262 | Spring Run | 1,048 |
| 17263 | State Line | 896 |
| 17247 | Quincy | 629 |
| 17235 | Marion | 622 |
| 17246 | Pleasant Hall | 542 |
| 17271 | Willow Hill | 527 |
| 17219 | Doylesburg | 484 |
| 17221 | Fannettsburg | 458 |
| 17254 | Scotland | 362 |
| 17220 | Dry Run | 347 |
| 17265 | Upperstrasburg | 300 |
| 17210 | Amberson | 242 |
| 17217 | Concord | 182 |
| 17251 | Roxbury | 70 |
| 17232 | Lurgan | 27 |
| 17250 | Rouzerville | 0 |
| 17261 | South Mountain | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 28 ZCTAs in Franklin County, Pennsylvania (US Census).