8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Petersburg | 1 | 2,233 | 2,300 | -0.58% | 1,521 | 1.47 | City |
| Jefferson township | 2 | 1,750 | 1,789 | -0.4% | 33 | 52.51 | Township |
| Lockhart township | 3 | 836 | 849 | -0.36% | 17 | 48.02 | Township |
| Winslow | 4 | 753 | 763 | -0.26% | 1,096 | 0.69 | Town |
| Logan township | 5 | 404 | 403 | 0.25% | 17 | 23.94 | Township |
| Otwell | 6 | 352 | 245 | -1.4% | 197 | 1.78 | CDP |
| Clay township | 7 | 306 | 312 | -0.33% | 13 | 23.58 | Township |
| Spurgeon | 8 | 164 | 168 | -0.61% | 937 | 0.17 | Town |
Petersburg is the largest city in Pike County, with a population of 2,233.
Spurgeon is the smallest city in Pike County.
There are 8 cities in Pike County, Indiana.