21 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Warren township | 1 | 104,951 | 106,146 | -0.12% | 2,173 | 48.30 | Township |
| Huntington township | 2 | 20,278 | 20,321 | -0.11% | 556 | 36.45 | Township |
| Huntington | 3 | 16,977 | 17,014 | -0.04% | 1,798 | 9.44 | City |
| Warren township | 4 | 7,847 | 7,773 | 0.33% | 244 | 32.21 | Township |
| Jackson township | 5 | 4,166 | 4,108 | 0.12% | 114 | 36.40 | Township |
| Warren township | 6 | 3,440 | 3,390 | 0.26% | 119 | 28.98 | Township |
| Salamonie township | 7 | 2,277 | 2,260 | 0.04% | 63 | 36.30 | Township |
| Dallas township | 8 | 2,031 | 2,016 | 0% | 90 | 22.67 | Township |
| Roanoke | 9 | 1,794 | 1,768 | 0.28% | 1,449 | 1.24 | Town |
| Rock Creek township | 10 | 1,257 | 1,251 | -0.08% | 35 | 36.41 | Township |
| Union township | 11 | 1,243 | 1,237 | 0% | 35 | 35.73 | Township |
| Warren | 12 | 1,197 | 1,182 | 0.25% | 1,105 | 1.08 | Town |
| Lancaster township | 13 | 1,153 | 1,149 | -0.09% | 32 | 35.62 | Township |
| Andrews | 14 | 1,055 | 1,044 | 0.19% | 1,664 | 0.63 | Town |
| Jefferson township | 15 | 735 | 724 | 0.14% | 20 | 35.95 | Township |
| Warren township | 16 | 715 | 697 | 0.56% | 20 | 35.90 | Township |
| Warren township | 17 | 660 | 657 | -0.15% | 27 | 24.33 | Township |
| Warren township | 18 | 588 | 594 | 0% | 20 | 29.44 | Township |
| Wayne township | 19 | 487 | 484 | 0% | 20 | 24.36 | Township |
| Polk township | 20 | 476 | 469 | 0% | 21 | 22.77 | Township |
| Mount Etna | 21 | 112 | 112 | 0% | 957 | 0.12 | Town |
Warren township is the largest city in Huntington County, with a population of 104,951.
Mount Etna is the smallest city in Huntington County.
There are 21 cities in Huntington County, Indiana.