Zip Code | City | Population |
|---|---|---|
| 04901 | Waterville | 26,463 |
| 04330 | Augusta | 26,394 |
| 04345 | Gardiner | 12,282 |
| 04963 | Oakland | 7,376 |
| 04364 | Winthrop | 6,138 |
| 04989 | Vassalboro | 4,526 |
| 04358 | South China | 4,434 |
| 04350 | Litchfield | 3,605 |
| 04259 | Monmouth | 3,410 |
| 04927 | Clinton | 3,381 |
| 04917 | Belgrade | 3,258 |
| 04344 | Farmingdale | 2,988 |
| 04363 | Windsor | 2,643 |
| 04355 | Readfield | 2,616 |
| 04347 | Hallowell | 2,558 |
| 04351 | Manchester | 2,387 |
| 04910 | Albion | 2,311 |
| 04352 | Mount Vernon | 1,618 |
| 04346 | Randolph | 1,522 |
| 04349 | Kents Hill | 1,302 |
| 04284 | Wayne | 1,069 |
| 04265 | North Monmouth | 697 |
| 04360 | Vienna | 642 |
| 04359 | South Gardiner | 326 |
| 04918 | Belgrade Lakes | 0 |
| 04926 | China Village | 0 |