23 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 43950 | Saint Clairsville | 16,422 |
| 43935 | Martins Ferry | 7,918 |
| 43906 | Bellaire | 7,888 |
| 43713 | Barnesville | 6,511 |
| 43912 | Bridgeport | 5,852 |
| 43947 | Shadyside | 4,894 |
| 43718 | Belmont | 2,810 |
| 43977 | Flushing | 2,576 |
| 43719 | Bethesda | 2,471 |
| 43942 | Powhatan Point | 2,087 |
| 43933 | Jacobsburg | 2,076 |
| 43983 | Piedmont | 651 |
| 43905 | Barton | 645 |
| 43940 | Neffs | 378 |
| 43985 | Holloway | 237 |
| 43759 | Morristown | 224 |
| 43967 | Warnock | 187 |
| 43928 | Glencoe | 114 |
| 43902 | Alledonia | 114 |
| 43972 | Bannock | 104 |
| 43934 | Lansing | 72 |
| 43909 | Blaine | 38 |
| 43951 | Lafferty | 37 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 23 ZCTAs in Belmont County, Ohio (US Census).