Founded in 1784, Franklin County is one of 67 counties in the state of Pennsylvania. Historically, Franklin County was formed from parts of Cumberland County. The city of Chambersburg is the county seat. With FIPS code of 55, Franklin County has a population of 156,289 and area of 771 square miles (1,997 km2).
List of all cities in Franklin County, PA alphabetically
| City/Town | Postal Code | Area Code |
| Africa, PA | 17236 | 717 |
| Altenwald, PA | 17268 | 717 |
| Amberson, PA | 17210 | 717 |
| Aqua, PA | 17201 | 717 |
| Beautiful, PA | 17201 | 717 |
| Biesecker Gap, PA | 17268 | 717 |
| Bino, PA | 17225 | 717 |
| Blue Ridge Summit, PA | 17214 | 717 |
| Boggstown, PA | 17221 | 717 |
| Bricker Dev, PA | 17224 | 717 |
| Chambersburg, PA | 17201 | 717 |
| 17202 | 717 | |
| Charlestown, PA | 17236 | 717 |
| Charmian, PA | 17214 | 717 |
| Cheesetown, PA | 17201 | 717 |
| Clay Hill, PA | 17201 | 717 |
| Claylick, PA | 17236 | 717 |
| Concord, PA | 17217 | 717 |
| Cosytown, PA | 17225 | 717 |
| Cove Gap, PA | 17236 | 717 |
| Cowans Gap, PA | 17224 | 717 |
| Cowans Village, PA | 17224 | 717 |
| Cress, PA | 17268 | 717 |
| Dickey, PA | 17236 | 717 |
| Doylesburg, PA | 17219 | 717 |
| Dry Run, PA | 17219 | 717 |
| 17220 | 717 | |
| Duffield, PA | 17201 | 717 |
| Eastland Hill, PA | 17268 | 717 |
| Fannett, PA | 17219 | 717 |
| Fannettsburg, PA | 17221 | 717 |
| Fayetteville, PA | 17222 | 717 |
| Fiveforks, PA | 17268 | 717 |
| Fort Loudon, PA | 17224 | 717 |
| Fox Hill, PA | 17268 | 717 |
| Franklin Furn, PA | 17201 | 717 |
| Glen Forney, PA | 17268 | 717 |
| Good, PA | 17268 | 717 |
| Greencastle, PA | 17225 | 717 |
| Greenvillage, PA | 17201 | 717 |
| Guilford, PA | 17201 | 717 |
| Guilford Sprs, PA | 17201 | 717 |
| Housum, PA | 17201 | 717 |
| Jackson Hall, PA | 17201 | 717 |
| Kasiesville, PA | 17236 | 717 |
| Kauffman, PA | 17201 | 717 |
| Kerrstown, PA | 17201 | 717 |
| Kerrstown Sq, PA | 17201 | 717 |
| Lemasters, PA | 17231 | 717 |
| Letterkenny Army Depo, PA | 17201 | 717 |
| Lurgan, PA | 17232 | 717 |
| Marion, PA | 17235 | 717 |
| Markes, PA | 17236 | 717 |
| Mason Dixon, PA | 17225 | 717 |
| Mercersburg, PA | 17236 | 717 |
| Metal, PA | 17224 | 717 |
| Milnor, PA | 17225 | 717 |
| Mont Alto, PA | 17237 | 717 |
| New Franklin, PA | 17201 | 717 |
| Nyesville, PA | 17201 | 717 |
| Orrstown, PA | 17244 | 717 |
| Pen Mar, PA | 17268 | 717 |
| Pennersville, PA | 17268 | 717 |
| Peters, PA | 17236 | 717 |
| Pleasant Hall, PA | 17246 | 717 |
| Polktown, PA | 17268 | 717 |
| Pond Bank, PA | 17201 | 717 |
| Quincy, PA | 17247 | 717 |
| Red Bridge, PA | 17201 | 717 |
| Richmond Furn, PA | 17224 | 717 |
| Roadside, PA | 17268 | 717 |
| Rouzerville, PA | 17250 | 717 |
| Roxbury, PA | 17251 | 717 |
| Saint Thomas, PA | 17252 | 717 |
| Scotland, PA | 17254 | 717 |
| Shady Grove, PA | 17256 | 717 |
| Shimpstown, PA | 17236 | 717 |
| South Mountain, PA | 17261 | 717 |
| Spring Run, PA | 17262 | 717 |
| State Line, PA | 17263 | 717 |
| Stoufferstown, PA | 17201 | 717 |
| Sunbeam, PA | 17201 | 717 |
| Sylvan, PA | 17236 | 717 |
| Tomstown, PA | 17268 | 717 |
| Turkeyfoot, PA | 17201 | 717 |
| Tuscarora Heights, PA | 17224 | 717 |
| Upper Strasbg, PA | 17265 | 717 |
| Upperstrasburg, PA | 17265 | 717 |
| Upton, PA | 17225 | 717 |
| Wayne Heights, PA | 17268 | 717 |
| Waynecastle, PA | 17225 | 717 |
| Waynesboro, PA | 17268 | 717 |
| Welsh Run, PA | 17225 | 717 |
| Weltys, PA | 17268 | 717 |
| Williamson, PA | 17270 | 717 |
| Willow Hill, PA | 17271 | 717 |
| Worleytown, PA | 17225 | 717 |
| Zullinger, PA | 17272 | 717 |