Identifiers: city · CDP · village
| Rank | Community | Population |
|---|---|---|
| 1 | Marietta (city), OH | 13,385 |
| 2 | Belpre (city), OH | 6,728 |
| 3 | Devola (CDP), OH | 2,639 |
| 4 | Reno (CDP), OH | 1,129 |
| 5 | Lowell (village), OH | 565 |
| 6 | Coolville (village), OH | 454 |
| 7 | Tuppers Plains (CDP), OH | 438 |
| 8 | Vincent (CDP), OH | 329 |
| 9 | Little Hocking (CDP), OH | 244 |
| 10 | Stewart (CDP), OH | 221 |
| 11 | Hockingport (CDP), OH | 205 |