Founded in 1789, Mifflin County is one of 67 counties in the state of Pennsylvania. Historically, Mifflin County was formed from parts of Cumberland and Northumberland Counties. The city of Lewistown is the county seat. With FIPS code of 87, Mifflin County has a population of 46,136 and area of 415 square miles (1,075 km2).
List of all cities in Mifflin County, PA alphabetically
| City/Town | Postal Code | Area Code |
| Alexander Spr, PA | 17004 | 717 |
| Alexander Springs, PA | 17004 | 717 |
| Alfarata, PA | 17841 | 570 |
| Allensville, PA | 17002 | 717 |
| Anderson, PA | 17029 | 717 |
| Atkinsons Mills, PA | 17051 | 717 |
| Bannerville, PA | 17841 | 570 |
| Barrville, PA | 17084 | 717 |
| Belleville, PA | 17004 | 717 |
| Belltown, PA | 17841 | 570 |
| Bratton, PA | 17044 | 717 |
| Burnham, PA | 17009 | 717 |
| Colonial Hill, PA | 17044 | 717 |
| Crossgrove, PA | 17841 | 570 |
| Decatur, PA | 17841 | 570 |
| Gardenview, PA | 17084 | 717 |
| Granville, PA | 17029 | 717 |
| Hawstone, PA | 17044 | 717 |
| Horningford, PA | 17044 | 717 |
| Juniata Terr, PA | 17044 | 717 |
| Klondyke, PA | 17044 | 717 |
| Lewistown, PA | 17044 | 717 |
| Lewistown Jun, PA | 17044 | 717 |
| Lewistwn, PA | 17044 | 717 |
| Little Kansas, PA | 17051 | 717 |
| Locke Mills, PA | 17063 | 717 |
| Longfellow, PA | 17044 | 717 |
| Maitland, PA | 17044 | 717 |
| Mattawana, PA | 17054 | 717 |
| Mc Clure, PA | 17841 | 570 |
| Mc Veytown, PA | 17051 | 717 |
| McClure, PA | 17841 | 570 |
| McVeytown, PA | 17051 | 717 |
| McVeytwn, PA | 17051 | 717 |
| Menno, PA | 17004 | 717 |
| Milroy, PA | 17063 | 717 |
| Naginey, PA | 17063 | 717 |
| Newtn Hamltn, PA | 17075 | 814 |
| Newton Hamilton, PA | 17075 | 814 |
| Paintersville, PA | 17044 | 717 |
| Reedsville, PA | 17084 | 717 |
| Roseann, PA | 17063 | 717 |
| Ryde, PA | 17051 | 717 |
| Shindle, PA | 17841 | 570 |
| Shraders, PA | 17084 | 717 |
| Siglerville, PA | 17063 | 717 |
| Soradoville, PA | 17841 | 570 |
| Strodes Mills, PA | 17044 | 717 |
| Union Mills, PA | 17004 | 717 |
| Vira, PA | 17044 | 717 |
| Wagner, PA | 17841 | 570 |
| West Beaver, PA | 17841 | 570 |
| Yeagertown, PA | 17099 | 717 |
| Yeagertwn, PA | 17099 | 717 |