15 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Upper | 1 | 13,692 | 14,414 | -0.52% | 562 | 24 | Township |
| Ironton | 2 | 9,944 | 10,553 | -1.01% | 2,225 | 4 | City |
| Union | 3 | 7,976 | 8,403 | -0.57% | 249 | 32 | Township |
| South Point | 4 | 3,580 | 3,829 | -1.13% | 1,216 | 3 | Village |
| Elizabeth | 5 | 2,402 | 2,523 | -0.58% | 46 | 52 | Township |
| Waterloo | 6 | 2,359 | 2,353 | 0.43% | 63 | 38 | Township |
| Lawrence | 7 | 2,248 | 2,357 | -0.49% | 67 | 33 | Township |
| Coal Grove | 8 | 1,764 | 1,883 | -1.12% | 925 | 2 | Village |
| Aid | 9 | 765 | 802 | -0.65% | 19 | 41 | Township |
| Chesapeake | 10 | 708 | 762 | -1.26% | 1,494 | 0 | Village |
| Proctorville | 11 | 487 | 523 | -1.22% | 2,046 | 0 | Village |
| Symmes | 12 | 399 | 420 | -0.5% | 11 | 38 | Township |
| Athalia | 13 | 264 | 278 | -0.75% | 385 | 1 | Village |
| Hanging Rock | 14 | 188 | 202 | -1.05% | 338 | 1 | Village |
| Washington | 15 | 171 | 179 | -0.58% | 7 | 24 | Township |
Upper is the largest city in Lawrence County, with a population of 13,692.
Washington is the smallest city in Lawrence County, with a population of 171.
There are 15 cities in Lawrence County, Ohio.