19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pee Pee township | 1 | 7,289 | 7,377 | -0.21% | 231 | 31.50 | Township |
| Beaver township | 2 | 6,668 | 6,743 | -0.1% | 198 | 33.70 | Township |
| Waverly | 3 | 4,085 | 4,157 | -0.34% | 981 | 4.16 | Village |
| Seal township | 4 | 3,378 | 3,347 | 0.06% | 119 | 28.38 | Township |
| Pebble township | 5 | 2,449 | 2,458 | 0% | 67 | 36.79 | Township |
| Piketon | 6 | 2,175 | 2,130 | 0.42% | 865 | 2.51 | Village |
| Newton township | 7 | 1,793 | 1,798 | -0.06% | 59 | 30.34 | Township |
| Benton township | 8 | 1,578 | 1,594 | -0.19% | 41 | 38.53 | Township |
| Beaver township | 9 | 1,260 | 1,263 | 0% | 53 | 23.85 | Township |
| Union township | 10 | 1,256 | 1,261 | -0.08% | 53 | 23.53 | Township |
| Mifflin township | 11 | 1,201 | 1,188 | 0.33% | 26 | 46.07 | Township |
| Sunfish township | 12 | 1,158 | 1,153 | 0.17% | 35 | 32.65 | Township |
| Scioto township | 13 | 1,032 | 1,042 | -0.19% | 42 | 24.50 | Township |
| Camp Creek township | 14 | 1,008 | 1,009 | 0% | 37 | 27.27 | Township |
| Beaver township | 15 | 760 | 755 | 0.26% | 26 | 29.25 | Township |
| Jasper township | 16 | 689 | 690 | 0.15% | 17 | 41 | Township |
| Clarktown | 17 | 590 | 477 | -4.07% | 289 | 2.04 | CDP |
| Beaver | 18 | 432 | 441 | -0.46% | 1,108 | 0.39 | Village |
| Cynthiana | 19 | 29 | 29 | 7.41% | 853 | 0.03 | CDP |
Pee Pee township is the largest city in Pike County, with a population of 7,289.
Cynthiana is the smallest city in Pike County.
There are 19 cities in Pike County, Ohio.