16 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 16365 | Warren | 17,292 |
| 16345 | Russell | 3,436 |
| 16371 | Youngsville | 3,211 |
| 16350 | Sugar Grove | 2,477 |
| 16340 | Pittsfield | 1,763 |
| 16313 | Clarendon | 1,653 |
| 16347 | Sheffield | 1,596 |
| 16351 | Tidioute | 1,576 |
| 16436 | Spring Creek | 639 |
| 16402 | Bear Lake | 624 |
| 16420 | Grand Valley | 515 |
| 16405 | Columbus | 514 |
| 16329 | Irvine | 441 |
| 16352 | Tiona | 263 |
| 16416 | Garland | 113 |
| 16312 | Chandlers Valley | 31 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 16 ZCTAs in Warren County, Pennsylvania (US Census).