| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Wayne | 1 | 277,366 | 264,377 | 0.79% | 2,482 | 112 | City |
| New Haven | 2 | 16,478 | 15,638 | 0.86% | 1,233 | 13 | City |
| Huntertown | 3 | 11,699 | 11,112 | 0.85% | 1,413 | 8 | Town |
| Leo-Cedarville | 4 | 3,820 | 3,637 | 0.79% | 1,026 | 4 | Town |
| Woodburn | 5 | 1,642 | 1,558 | 0.86% | 1,705 | 1 | City |
| Monroeville | 6 | 1,366 | 1,300 | 0.81% | 1,742 | 1 | Town |
| Grabill | 7 | 1,178 | 1,116 | 0.86% | 1,810 | 1 | Town |
| Zanesville | 8 | 604 | 581 | 0.67% | 730 | 1 | Town |
Fort Wayne is the largest city in Allen County, with a population of 277,366.
Zanesville is the smallest city in Allen County, with a population of 604.
There are 8 cities in Allen County, Indiana.