18 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lincoln | 1 | 40,646 | 34,925 | 2.36% | 1,715 | 24 | Township |
| Plainfield | 2 | 39,244 | 34,899 | 1.88% | 1,441 | 27 | Town |
| Brownsburg | 3 | 35,560 | 29,169 | 3.09% | 2,091 | 17 | Town |
| Avon | 4 | 26,275 | 21,655 | 3.02% | 1,341 | 20 | Town |
| Center | 5 | 16,826 | 13,196 | 5.63% | 366 | 46 | Township |
| Brown | 6 | 15,860 | 14,391 | 1.44% | 630 | 25 | Township |
| Danville | 7 | 13,461 | 10,673 | 3.58% | 1,338 | 10 | Town |
| Middle | 8 | 7,678 | 6,916 | 0.8% | 247 | 31 | Township |
| Pittsboro | 9 | 4,550 | 3,764 | 2.96% | 1,063 | 4 | Town |
| Clay | 10 | 2,438 | 2,355 | 0.37% | 92 | 26 | Township |
| Union | 11 | 1,880 | 1,836 | 0.11% | 78 | 24 | Township |
| Eel River | 12 | 1,774 | 1,714 | 0.34% | 42 | 42 | Township |
| Clermont | 13 | 1,386 | 1,383 | 0.07% | 2,075 | 1 | Town |
| Clayton | 14 | 965 | 916 | 0.84% | 1,485 | 1 | Town |
| Lizton | 15 | 507 | 506 | 0% | 693 | 1 | Town |
| North Salem | 16 | 480 | 462 | 0.63% | 1,399 | 0 | Town |
| Amo | 17 | 431 | 416 | 0.7% | 704 | 1 | Town |
| Stilesville | 18 | 280 | 268 | 0.72% | 751 | 0 | Town |
Lincoln is the largest city in Hendricks County, with a population of 40,646.
Stilesville is the smallest city in Hendricks County, with a population of 280.
There are 18 cities in Hendricks County, Indiana.