38 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 |
| Unity | 3 | 9,410 | 9,700 | -0.4% | 266 | 35 | Township |
| St. Clair | 4 | 7,527 | 7,773 | -0.42% | 256 | 29 | Township |
| Columbiana | 5 | 6,871 | 6,577 | 0.72% | 1,125 | 6 | City |
| Salem | 6 | 5,731 | 5,241 | 1.17% | 259 | 22 | Township |
| Center | 7 | 5,647 | 5,835 | -0.41% | 160 | 35 | Township |
| Salem | 8 | 5,202 | 5,310 | -0.34% | 179 | 29 | Township |
| Salem | 9 | 4,955 | 5,114 | -0.38% | 159 | 31 | Township |
| East Palestine | 10 | 4,590 | 4,748 | -0.56% | 1,456 | 3 | Village |
| Elkrun | 11 | 4,303 | 4,346 | -0.09% | 120 | 36 | Township |
| Knox | 12 | 3,900 | 4,024 | -0.43% | 110 | 35 | Township |
| Liverpool | 13 | 3,752 | 3,866 | -0.37% | 519 | 7 | Township |
| Hanover | 14 | 3,369 | 3,466 | -0.35% | 94 | 36 | Township |
| Middleton | 15 | 3,216 | 3,322 | -0.43% | 91 | 35 | Township |
| West | 16 | 3,093 | 3,156 | -0.26% | 89 | 35 | Township |
| Wellsville | 17 | 2,987 | 3,107 | -0.67% | 1,658 | 2 | Village |
| Salem | 18 | 2,695 | 2,787 | -0.37% | 74 | 37 | Township |
| Salem | 19 | 2,521 | 2,505 | 0.08% | 50 | 51 | Township |
| Lisbon | 20 | 2,485 | 2,586 | -0.68% | 1,476 | 2 | Village |
| Salem | 21 | 2,068 | 2,077 | 0.1% | 78 | 27 | Township |
| Washington | 22 | 1,931 | 1,988 | -0.36% | 88 | 22 | Township |
| Yellow Creek | 23 | 1,873 | 1,936 | -0.43% | 95 | 20 | Township |
| Leetonia | 24 | 1,763 | 1,829 | -0.62% | 779 | 2 | Village |
| Salem | 25 | 1,540 | 1,597 | -0.71% | 45 | 34 | Township |
| Salineville | 26 | 1,150 | 1,200 | -0.69% | 521 | 2 | Village |
| New Waterford | 27 | 1,149 | 1,191 | -0.61% | 1,268 | 1 | Village |
| Salem | 28 | 1,031 | 1,057 | -0.19% | 37 | 28 | Township |
| Salem | 29 | 915 | 953 | -0.44% | 25 | 36 | Township |
| Salem | 30 | 914 | 953 | -1.08% | 21 | 44 | Township |
| Salem | 31 | 902 | 908 | 0% | 36 | 25 | Township |
| Salem | 32 | 823 | 813 | 0.49% | 42 | 20 | Township |
| Salem | 33 | 778 | 818 | -1.02% | 30 | 26 | Township |
| Washingtonville | 34 | 692 | 713 | -0.43% | 1,036 | 1 | Village |
| Salem | 35 | 450 | 466 | -1.1% | 18 | 25 | Township |
| Hanoverton | 36 | 339 | 353 | -0.59% | 488 | 1 | Village |
| Rogers | 37 | 187 | 193 | -0.53% | 824 | 0 | Village |
| Summitville | 38 | 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 38 cities in Columbiana County, Ohio.