18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Adams township | 1 | 5,245 | 5,097 | 0.44% | 94 | 55.80 | Township |
| Marshall township | 2 | 4,527 | 4,556 | -0.35% | 125 | 36.32 | Township |
| Rockville | 3 | 2,646 | 2,511 | 1.03% | 1,773 | 1.49 | Town |
| Florida township | 4 | 2,342 | 2,252 | 0.86% | 49 | 48.18 | Township |
| Union township | 5 | 1,545 | 1,477 | 0.98% | 47 | 32.69 | Township |
| Reserve township | 6 | 1,311 | 1,284 | 0.54% | 52 | 25.11 | Township |
| Montezuma | 7 | 930 | 922 | 0.22% | 1,535 | 0.61 | Town |
| Penn township | 8 | 778 | 743 | 1.04% | 33 | 23.73 | Township |
| Jackson township | 9 | 733 | 711 | 0.69% | 21 | 35.62 | Township |
| Raccoon township | 10 | 699 | 677 | 0.72% | 19 | 37.05 | Township |
| Rosedale | 11 | 659 | 638 | 0.61% | 1,668 | 0.40 | Town |
| Greene township | 12 | 435 | 410 | 1.16% | 12 | 35.55 | Township |
| Van Bibber Lake | 13 | 415 | 659 | -1.19% | 1,609 | 0.26 | CDP |
| Howard township | 14 | 387 | 375 | 0.78% | 16 | 23.75 | Township |
| Sugar Creek township | 15 | 325 | 313 | 0.93% | 13 | 24.89 | Township |
| Mecca | 16 | 279 | 266 | 1.09% | 710 | 0.39 | Town |
| Marshall | 17 | 277 | 271 | 0.36% | 1,082 | 0.26 | Town |
| Bloomingdale | 18 | 273 | 263 | 0.74% | 469 | 0.58 | Town |
Adams township is the largest city in Parke County, with a population of 5,245.
Bloomingdale is the smallest city in Parke County.
There are 18 cities in Parke County, Indiana.