15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center township | 1 | 33,570 | 28,819 | 3.71% | 634 | 52.97 | Township |
| Greenfield | 2 | 27,486 | 23,570 | 2.93% | 1,958 | 14.04 | City |
| Sugar Creek township | 3 | 18,456 | 16,576 | 2.8% | 522 | 35.35 | Township |
| Cumberland | 4 | 6,709 | 5,983 | 2.21% | 2,387 | 2.81 | Town |
| Fortville | 5 | 4,818 | 4,808 | 0.04% | 1,336 | 3.61 | Town |
| New Palestine | 6 | 4,047 | 2,781 | 6.67% | 1,990 | 2.03 | Town |
| Brown township | 7 | 2,565 | 2,521 | 1.18% | 83 | 30.76 | Township |
| Brandywine township | 8 | 2,475 | 2,403 | 1.43% | 102 | 24.23 | Township |
| Jackson township | 9 | 1,787 | 1,738 | 1.42% | 50 | 35.54 | Township |
| Green township | 10 | 1,699 | 1,640 | 1.55% | 56 | 30.24 | Township |
| Blue River township | 11 | 1,475 | 1,433 | 1.44% | 50 | 29.75 | Township |
| Greenfield township | 12 | 1,355 | 1,345 | 0% | 37 | 36.34 | Township |
| Greenfield township | 13 | 721 | 725 | 0.14% | 17 | 41.20 | Township |
| Wilkinson | 14 | 400 | 422 | -0.99% | 1,990 | 0.20 | Town |
| Spring Lake | 15 | 210 | 212 | 0% | 1,373 | 0.15 | Town |
Center township is the largest city in Hancock County, with a population of 33,570.
Spring Lake is the smallest city in Hancock County.
There are 15 cities in Hancock County, Indiana.