13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Salem | 1 | 11,588 | 11,878 | -0.41% | 1,802 | 6 | City |
| East Liverpool | 2 | 9,511 | 9,931 | -0.73% | 2,023 | 5 | City |
| Columbiana | 3 | 6,871 | 6,577 | 0.72% | 1,125 | 6 | City |
| East Palestine | 4 | 4,590 | 4,748 | -0.56% | 1,456 | 3 | Village |
| Wellsville | 5 | 2,987 | 3,107 | -0.67% | 1,658 | 2 | Village |
| Lisbon | 6 | 2,485 | 2,586 | -0.68% | 1,476 | 2 | Village |
| Leetonia | 7 | 1,763 | 1,829 | -0.62% | 779 | 2 | Village |
| Salineville | 8 | 1,150 | 1,200 | -0.69% | 521 | 2 | Village |
| New Waterford | 9 | 1,149 | 1,191 | -0.61% | 1,268 | 1 | Village |
| Washingtonville | 10 | 692 | 713 | -0.43% | 1,036 | 1 | Village |
| Hanoverton | 11 | 339 | 353 | -0.59% | 488 | 1 | Village |
| Rogers | 12 | 187 | 193 | -0.53% | 824 | 0 | Village |
| Summitville | 13 | 106 | 109 | 0% | 115 | 1 | Village |
Salem is the largest city in Columbiana County, with a population of 11,588.
Summitville is the smallest city in Columbiana County, with a population of 106.
There are 13 cities in Columbiana County, Ohio.