25 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 44483 | Warren | 25,602 |
| 44484 | Warren | 21,634 |
| 44446 | Niles | 20,014 |
| 44410 | Cortland | 16,467 |
| 44485 | Warren | 15,194 |
| 44420 | Girard | 15,066 |
| 44425 | Hubbard | 13,329 |
| 44481 | Warren | 10,287 |
| 44444 | Newton Falls | 9,306 |
| 44438 | Masury | 5,045 |
| 44440 | Mineral Ridge | 4,932 |
| 44430 | Leavittsburg | 4,554 |
| 44473 | Vienna | 4,106 |
| 44470 | Southington | 4,074 |
| 44437 | McDonald | 3,900 |
| 44403 | Brookfield | 3,766 |
| 44491 | West Farmington | 3,683 |
| 44428 | Kinsman | 3,196 |
| 44402 | Bristolville | 2,588 |
| 44450 | North Bloomfield | 2,217 |
| 44404 | Burghill | 1,712 |
| 44417 | Farmdale | 1,423 |
| 44418 | Fowler | 1,198 |
| 44439 | Mesopotamia | 482 |
| 44424 | Hartford | 84 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 25 ZCTAs in Trumbull County, Ohio (US Census).