| Zip Code | City | Population ↓ |
|---|---|---|
| 17044 | Lewistown | 20,207 |
| 17004 | Belleville | 5,376 |
| 17841 | McClure | 4,852 |
| 17051 | McVeytown | 4,772 |
| 17084 | Reedsville | 4,699 |
| 17063 | Milroy | 3,273 |
| 17009 | Burnham | 1,652 |
| 17099 | Yeagertown | 1,220 |
| 17054 | Mattawana | 286 |
| 17029 | Granville | 266 |
| 17075 | Newton Hamilton | 151 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Mifflin County, Pennsylvania (US Census).