| Zip Code | City | Population ↓ |
|---|---|---|
| 4426 | Dover Foxcroft | 4,903 |
| 4462 | Millinocket | 4,506 |
| 4463 | Milo | 2,678 |
| 4443 | Guilford | 2,162 |
| 4441 | Greenville | 1,761 |
| 4414 | Brownville | 1,759 |
| 4479 | Sangerville | 1,141 |
| 4406 | Abbot | 671 |
| 4481 | Sebec | 548 |
| 4464 | Monson | 493 |
| 4415 | Brownville Junction | 271 |
| 4485 | Shirley Mills | 183 |
| 4442 | Greenville Junction | 135 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 13 ZCTAs in Piscataquis County, Maine (US Census).