| Zip Code | City | Population ↓ |
|---|---|---|
| 43950 | Saint Clairsville | 16,472 |
| 43935 | Martins Ferry | 7,998 |
| 43906 | Bellaire | 7,987 |
| 43713 | Barnesville | 6,544 |
| 43912 | Bridgeport | 6,011 |
| 43947 | Shadyside | 4,869 |
| 43718 | Belmont | 2,704 |
| 43719 | Bethesda | 2,593 |
| 43942 | Powhatan Point | 2,281 |
| 43977 | Flushing | 2,155 |
| 43933 | Jacobsburg | 2,052 |
| 43905 | Barton | 607 |
| 43983 | Piedmont | 534 |
| 43940 | Neffs | 388 |
| 43759 | Morristown | 269 |
| 43967 | Warnock | 240 |
| 43985 | Holloway | 223 |
| 43972 | Bannock | 119 |
| 43902 | Alledonia | 118 |
| 43928 | Glencoe | 112 |
| 43934 | Lansing | 78 |
| 43909 | Blaine | 61 |
| 43951 | Lafferty | 55 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 23 ZCTAs in Belmont County, Ohio (US Census).