There are 22 zip codes in Northumberland County, Pennsylvania. The most populated is 17801, located in Sunbury. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 17801 | 16,236 | Sunbury |
| 17847 | 11,479 | Milton |
| 17866 | 9,905 | Coal Township |
| 17872 | 9,157 | Shamokin |
| 17857 | 7,708 | Northumberland |
| 17851 | 7,232 | Mount Carmel |
| 17777 | 6,709 | Watsontown |
| 17834 | 3,498 | Kulpmont |
| 17860 | 2,485 | Paxinos |
| 17830 | 1,971 | Herndon |
| 17017 | 1,516 | Dalmatia |
| 17881 | 1,439 | Trevorton |
| 17823 | 1,304 | Dornsife |
| 17868 | 1,057 | Riverside |
| 17832 | 654 | Marion Heights |
| 17850 | 617 | Montandon |
| 17840 | 363 | Locust Gap |
| 17749 | 274 | McEwensville |
| 17836 | 224 | Leck Kill |
| 17867 | 191 | Rebuck |
| 17730 | 47 | Dewart |
| 17865 | 33 | Potts Grove |