5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Carmel | 1 | 6,718 | 6,981 | -0.78% | 1,397 | 5 | City |
| Lancaster | 2 | 1,336 | 1,388 | -0.52% | 42 | 32 | Township |
| Allendale | 3 | 439 | 456 | -0.9% | 1,430 | 0 | Village |
| Bellmont | 4 | 237 | 244 | -0.84% | 729 | 0 | Village |
| Keensburg | 5 | 170 | 177 | -1.16% | 654 | 0 | Village |
Mount Carmel is the largest city in Wabash County, with a population of 6,718.
Keensburg is the smallest city in Wabash County, with a population of 170.
There are 5 cities in Wabash County, Illinois.