19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lincoln township | 1 | 39,349 | 34,916 | 2.15% | 1,661 | 23.70 | Township |
| Plainfield | 2 | 38,475 | 34,905 | 1.89% | 1,431 | 26.89 | Town |
| Brownsburg | 3 | 34,296 | 29,181 | 3.07% | 2,017 | 17 | Town |
| Avon | 4 | 25,928 | 21,685 | 3.39% | 1,341 | 19.33 | Town |
| Brown township | 5 | 15,538 | 14,389 | 1.36% | 617 | 25.19 | Township |
| Center township | 6 | 15,056 | 13,196 | 3.36% | 327 | 46.03 | Township |
| Danville | 7 | 12,102 | 10,659 | 2.45% | 1,203 | 10.06 | Town |
| Middle township | 8 | 7,524 | 6,915 | 0.4% | 242 | 31.06 | Township |
| Pittsboro | 9 | 4,547 | 3,767 | 3.55% | 1,113 | 4.08 | Town |
| Heritage Lake | 10 | 2,743 | 2,917 | -0.33% | 911 | 3.01 | CDP |
| Clay township | 11 | 2,426 | 2,353 | 0.54% | 92 | 26.39 | Township |
| Union township | 12 | 1,875 | 1,835 | 0.32% | 78 | 24.05 | Township |
| Eel River township | 13 | 1,767 | 1,711 | 0.57% | 42 | 42.41 | Township |
| Clermont | 14 | 1,359 | 1,378 | -0.29% | 2,034 | 0.67 | Town |
| Clayton | 15 | 934 | 916 | 0.43% | 1,437 | 0.65 | Town |
| Lizton | 16 | 513 | 513 | 0% | 701 | 0.73 | Town |
| North Salem | 17 | 478 | 463 | 0.63% | 1,394 | 0.34 | Town |
| Amo | 18 | 420 | 409 | 0.48% | 686 | 0.61 | Town |
| Stilesville | 19 | 278 | 268 | 0.72% | 745 | 0.37 | Town |
Lincoln township is the largest city in Hendricks County, with a population of 39,349.
Stilesville is the smallest city in Hendricks County.
There are 19 cities in Hendricks County, Indiana.