| Zip Code | City | Population ↓ |
|---|---|---|
| 44512 | Youngstown | 32,821 |
| 44515 | Youngstown | 27,543 |
| 44514 | Youngstown | 23,391 |
| 44406 | Canfield | 22,101 |
| 44511 | Youngstown | 19,354 |
| 44505 | Youngstown | 16,534 |
| 44509 | Youngstown | 11,044 |
| 44471 | Struthers | 10,383 |
| 44502 | Youngstown | 9,043 |
| 44405 | Campbell | 7,841 |
| 44504 | Youngstown | 5,165 |
| 44672 | Sebring | 4,781 |
| 44507 | Youngstown | 4,761 |
| 44442 | New Middletown | 3,864 |
| 44436 | Lowellville | 3,348 |
| 44609 | Beloit | 3,267 |
| 44451 | North Jackson | 2,993 |
| 44452 | North Lima | 2,984 |
| 44401 | Berlin Center | 2,716 |
| 44506 | Youngstown | 2,489 |
| 44429 | Lake Milton | 2,353 |
| 44510 | Youngstown | 2,064 |
| 44443 | New Springfield | 2,062 |
| 44449 | North Benton | 1,526 |
| 44503 | Youngstown | 960 |
| 44454 | Petersburg | 639 |
| 44555 | Youngstown | 177 |
| 44619 | Damascus | 121 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 28 ZCTAs in Mahoning County, Ohio (US Census).