51 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Salem | 1 | 11,606 | 11,878 | -0.46% | 1,805 | 6.43 | City |
| East Liverpool | 2 | 9,553 | 9,932 | -0.79% | 2,032 | 4.70 | City |
| Unity township | 3 | 9,442 | 9,698 | -0.48% | 267 | 35.41 | Township |
| St. Clair township | 4 | 7,560 | 7,779 | -0.51% | 257 | 29.46 | Township |
| Columbiana | 5 | 6,877 | 6,576 | 0.88% | 1,126 | 6.11 | City |
| Center township | 6 | 5,672 | 5,836 | -0.53% | 161 | 35.32 | Township |
| Salem township | 7 | 5,650 | 5,239 | 1.35% | 255 | 22.13 | Township |
| Salem township | 8 | 5,230 | 5,311 | -0.25% | 180 | 29.03 | Township |
| Salem township | 9 | 4,963 | 5,111 | -0.52% | 159 | 31.14 | Township |
| East Palestine | 10 | 4,602 | 4,742 | -0.6% | 1,460 | 3.15 | Village |
| Elkrun township | 11 | 4,292 | 4,344 | -0.21% | 120 | 35.78 | Township |
| Calcutta | 12 | 4,126 | 4,306 | 0.63% | 339 | 12.17 | CDP |
| Knox township | 13 | 3,910 | 4,024 | -0.53% | 111 | 35.34 | Township |
| Liverpool township | 14 | 3,745 | 3,857 | -0.5% | 518 | 7.23 | Township |
| Hanover township | 15 | 3,371 | 3,462 | -0.44% | 94 | 35.81 | Township |
| Middleton township | 16 | 3,226 | 3,323 | -0.55% | 92 | 35.17 | Township |
| West township | 17 | 3,088 | 3,160 | -0.39% | 88 | 34.92 | Township |
| Wellsville | 18 | 2,997 | 3,106 | -0.73% | 1,663 | 1.80 | Village |
| Salem township | 19 | 2,684 | 2,788 | -0.7% | 74 | 36.51 | Township |
| Salem township | 20 | 2,515 | 2,497 | 0.24% | 50 | 50.77 | Township |
| Lisbon | 21 | 2,497 | 2,586 | -0.72% | 1,483 | 1.68 | Village |
| Salem township | 22 | 2,068 | 2,077 | 0.15% | 78 | 26.55 | Township |
| Glenmoor | 23 | 2,040 | 1,713 | 0.2% | 730 | 2.79 | CDP |
| Washington township | 24 | 1,934 | 1,990 | -0.46% | 88 | 22.04 | Township |
| Yellow Creek township | 25 | 1,878 | 1,936 | -0.53% | 95 | 19.75 | Township |
| Leetonia | 26 | 1,765 | 1,827 | -0.68% | 780 | 2.26 | Village |
| Salem township | 27 | 1,567 | 1,599 | -0.19% | 46 | 33.93 | Township |
| Guilford Lake | 28 | 1,195 | 1,032 | 7.17% | 505 | 2.37 | CDP |
| Salineville | 29 | 1,155 | 1,200 | -0.77% | 523 | 2.21 | Village |
| New Waterford | 30 | 1,152 | 1,192 | -0.69% | 1,272 | 0.91 | Village |
| La Croft | 31 | 1,130 | 1,048 | -0.09% | 989 | 1.14 | CDP |
| Salem township | 32 | 1,035 | 1,058 | -0.38% | 37 | 27.82 | Township |
| Salem township | 33 | 943 | 955 | -0.32% | 22 | 43.53 | Township |
| Salem township | 34 | 919 | 953 | -0.54% | 25 | 36.35 | Township |
| Salem township | 35 | 909 | 906 | 0.33% | 36 | 25.21 | Township |
| Bolton | 36 | 889 | 896 | 7.11% | 1,174 | 0.76 | CDP |
| Lake Tomahawk | 37 | 850 | 713 | 2.91% | 1,029 | 0.83 | CDP |
| Salem township | 38 | 818 | 813 | 0.37% | 42 | 19.61 | Township |
| Salem township | 39 | 792 | 818 | -0.63% | 31 | 25.80 | Township |
| Homeworth | 40 | 700 | 663 | 2.19% | 565 | 1.24 | CDP |
| Washingtonville | 41 | 693 | 712 | -0.57% | 1,037 | 0.67 | Village |
| Salem township | 42 | 467 | 465 | 0.65% | 19 | 24.80 | Township |
| Maple Ridge | 43 | 422 | 606 | -5.17% | 229 | 1.84 | CDP |
| Hanoverton | 44 | 340 | 354 | -0.87% | 489 | 0.69 | Village |
| Negley | 45 | 311 | 352 | 0.65% | 347 | 0.90 | CDP |
| Marlboro | 46 | 304 | 296 | 7.04% | 707 | 0.43 | CDP |
| Salem Heights | 47 | 220 | 322 | 7.32% | 330 | 0.67 | CDP |
| Rogers | 48 | 184 | 191 | -0.54% | 811 | 0.23 | Village |
| East Alliance | 49 | 144 | 144 | 7.46% | 182 | 0.79 | CDP |
| East Rochester | 50 | 132 | 85 | -5.04% | 310 | 0.43 | CDP |
| Summitville | 51 | 105 | 109 | -0.94% | 114 | 0.92 | Village |
Salem is the largest city in Columbiana County, with a population of 11,606.
Summitville is the smallest city in Columbiana County.
There are 51 cities in Columbiana County, Ohio.