There are 20 cities in Franklin County, Pennsylvania.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Chambersburg | 1 | Pennsylvania | 22,464 | 21,880 | 0.65% | 3,244 | 6.92 |
| Waynesboro | 2 | Pennsylvania | 11,024 | 11,030 | -0.01% | 3,213 | 3.43 |
| Shippensburg | 3 | Pennsylvania | 5,573 | 5,485 | 0.4% | 2,748 | 2.03 |
| Guilford | 4 | Pennsylvania | 4,339 | 3,571 | 4.63% | 2,801 | 1.55 |
| Greencastle | 5 | Pennsylvania | 4,204 | 4,244 | -0.24% | 2,647 | 1.59 |
| State Line | 6 | Pennsylvania | 3,242 | 3,548 | -2.29% | 1,184 | 2.74 |
| Wayne Heights | 7 | Pennsylvania | 2,879 | 2,605 | -4.45% | 1,348 | 2.14 |
| Fayetteville | 8 | Pennsylvania | 2,705 | 2,855 | -0.73% | 829 | 3.26 |
| Shippensburg University | 9 | Pennsylvania | 1,961 | 1,887 | 0.98% | 7,029 | 0.28 |
| Scotland | 10 | Pennsylvania | 1,615 | 734 | 15.6% | 1,960 | 0.82 |
| Mont Alto | 11 | Pennsylvania | 1,566 | 1,582 | -0.26% | 2,782 | 0.56 |
| Mercersburg | 12 | Pennsylvania | 1,486 | 1,504 | -0.27% | 1,647 | 0.90 |
| Blue Ridge Summit | 13 | Pennsylvania | 1,398 | 680 | 14.78% | 1,905 | 0.73 |
| Pen Mar | 14 | Pennsylvania | 1,169 | 1,185 | -0.34% | 1,582 | 0.74 |
| Marion | 15 | Pennsylvania | 1,144 | 1,551 | 0.79% | 575 | 1.99 |
| Fort Loudon | 16 | Pennsylvania | 950 | 1,168 | -5.38% | 223 | 4.26 |
| Rouzerville | 17 | Pennsylvania | 592 | 746 | -6.03% | 900 | 0.66 |
| Newburg | 18 | Pennsylvania | 372 | 364 | 0.54% | 2,011 | 0.18 |
| Orrstown | 19 | Pennsylvania | 212 | 214 | 0% | 3,313 | 0.06 |
| East Waterford | 20 | Pennsylvania | 116 | 174 | -10.77% | 309 | 0.38 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Chambersburg is the largest city in Franklin County.
East Waterford is the smallest city in Franklin County.
There are 20 cities in Franklin County, Pennsylvania.