8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Wayne | 1 | 277,607 | 264,394 | 0.8% | 2,484 | 112 | City |
| New Haven | 2 | 16,482 | 15,635 | 0.86% | 1,234 | 13 | City |
| Huntertown | 3 | 11,673 | 11,097 | 0.83% | 1,410 | 8 | Town |
| Leo-Cedarville | 4 | 3,823 | 3,636 | 0.82% | 1,027 | 4 | Town |
| Woodburn | 5 | 1,641 | 1,556 | 0.86% | 1,704 | 1 | City |
| Monroeville | 6 | 1,366 | 1,297 | 0.89% | 1,742 | 1 | Town |
| Grabill | 7 | 1,184 | 1,117 | 0.94% | 1,819 | 1 | Town |
| Zanesville | 8 | 600 | 579 | 0.67% | 726 | 1 | Town |
Fort Wayne is the largest city in Allen County, with a population of 277,607.
Zanesville is the smallest city in Allen County, with a population of 600.
There are 8 cities in Allen County, Indiana.