16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Upper township | 1 | 13,671 | 14,417 | -0.87% | 561 | 24.35 | Township |
| Ironton | 2 | 9,942 | 10,554 | -1.21% | 2,225 | 4.47 | City |
| Union township | 3 | 7,989 | 8,395 | -0.76% | 250 | 31.98 | Township |
| South Point | 4 | 3,581 | 3,825 | -1.35% | 1,216 | 2.94 | Village |
| Burlington | 5 | 2,806 | 2,997 | 0.32% | 2,013 | 1.39 | CDP |
| Elizabeth township | 6 | 2,412 | 2,524 | -0.7% | 47 | 51.86 | Township |
| Waterloo township | 7 | 2,300 | 2,355 | -0.39% | 61 | 37.73 | Township |
| Lawrence township | 8 | 2,249 | 2,357 | -0.71% | 67 | 33.33 | Township |
| Coal Grove | 9 | 1,785 | 1,889 | -1.16% | 937 | 1.91 | Village |
| Aid township | 10 | 769 | 800 | -0.52% | 19 | 40.74 | Township |
| Chesapeake | 11 | 709 | 759 | -1.39% | 1,496 | 0.47 | Village |
| Proctorville | 12 | 489 | 524 | -1.41% | 2,055 | 0.24 | Village |
| Symmes township | 13 | 399 | 420 | -0.75% | 11 | 37.63 | Township |
| Athalia | 14 | 263 | 278 | -1.13% | 383 | 0.69 | Village |
| Hanging Rock | 15 | 189 | 203 | -1.56% | 340 | 0.56 | Village |
| Washington township | 16 | 175 | 180 | 0% | 7 | 24.19 | Township |
Upper township is the largest city in Lawrence County, with a population of 13,671.
Washington township is the smallest city in Lawrence County.
There are 16 cities in Lawrence County, Ohio.