10 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fishers | 1 | 106,228 | 99,502 | 1.07% | 2,905 | 37 | City |
| Carmel | 2 | 105,455 | 99,907 | 0.88% | 2,148 | 49 | City |
| Noblesville | 3 | 77,777 | 70,163 | 1.66% | 2,182 | 36 | City |
| Westfield | 4 | 70,978 | 47,025 | 5.96% | 2,153 | 33 | City |
| McCordsville | 5 | 13,172 | 8,888 | 5.73% | 1,528 | 9 | Town |
| Cicero | 6 | 5,750 | 5,321 | 1.27% | 3,530 | 2 | Town |
| Sheridan | 7 | 3,675 | 3,111 | 2.62% | 76 | 48 | Town |
| Arcadia | 8 | 1,439 | 1,513 | -0.83% | 2,095 | 1 | Town |
| Atlanta | 9 | 745 | 721 | 0.54% | 2,380 | 0 | Town |
| Williams Creek | 10 | 429 | 428 | 0% | 1,292 | 0 | Town |
Fishers is the largest city in Hamilton County, with a population of 106,228.
Williams Creek is the smallest city in Hamilton County, with a population of 429.
There are 10 cities in Hamilton County, Indiana.