| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Plainfield | 1 | 39,430 | 34,903 | 2.22% | 1,448 | 27 | Town |
| Brownsburg | 2 | 35,120 | 29,184 | 3.02% | 2,066 | 17 | Town |
| Avon | 3 | 26,096 | 21,858 | 2.94% | 1,332 | 20 | Town |
| Danville | 4 | 13,870 | 10,692 | 3.39% | 1,378 | 10 | Town |
| Pittsboro | 5 | 4,572 | 3,766 | 2.9% | 1,068 | 4 | Town |
| Clermont | 6 | 1,407 | 1,380 | 0.29% | 2,106 | 1 | Town |
| Clayton | 7 | 955 | 916 | 0.74% | 1,469 | 1 | Town |
| Lizton | 8 | 505 | 506 | 0% | 690 | 1 | Town |
| North Salem | 9 | 476 | 460 | 0.63% | 1,388 | 0 | Town |
| Amo | 10 | 431 | 416 | 0.7% | 704 | 1 | Town |
| Stilesville | 11 | 277 | 267 | 0.36% | 743 | 0 | Town |
Plainfield is the largest city in Hendricks County, with a population of 39,430.
Stilesville is the smallest city in Hendricks County, with a population of 277.
There are 11 cities in Hendricks County, Indiana.