19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wabash township | 1 | 65,368 | 64,265 | 0.26% | 1,352 | 48.36 | Township |
| Noble township | 2 | 13,516 | 13,861 | -0.68% | 165 | 81.90 | Township |
| Wabash | 3 | 10,169 | 10,419 | -0.49% | 1,054 | 9.64 | City |
| Chester township | 4 | 6,872 | 7,005 | -0.52% | 106 | 65.03 | Township |
| Wabash township | 5 | 6,662 | 6,540 | 0.36% | 185 | 36.02 | Township |
| North Manchester | 6 | 5,193 | 5,273 | -0.31% | 1,464 | 3.55 | Town |
| Lagro township | 7 | 2,681 | 2,725 | -0.52% | 33 | 81.24 | Township |
| Pleasant township | 8 | 2,355 | 2,373 | -0.3% | 43 | 54.29 | Township |
| Paw Paw township | 9 | 1,535 | 1,557 | -0.52% | 38 | 40.26 | Township |
| Waltz township | 10 | 1,188 | 1,206 | -0.5% | 27 | 43.28 | Township |
| Wabash township | 11 | 804 | 770 | 0.88% | 29 | 27.49 | Township |
| La Fontaine | 12 | 791 | 801 | -0.25% | 1,295 | 0.61 | Town |
| Wabash township | 13 | 696 | 692 | 0.43% | 21 | 32.96 | Township |
| Wabash township | 14 | 516 | 535 | -0.58% | 22 | 23.46 | Township |
| Roann | 15 | 433 | 438 | -0.23% | 1,874 | 0.23 | Town |
| Lagro | 16 | 344 | 348 | -0.29% | 580 | 0.59 | Town |
| Somerset | 17 | 256 | 380 | -3.76% | 376 | 0.68 | CDP |
| Laketon | 18 | 212 | 445 | -11.3% | 201 | 1.05 | CDP |
| Wabash township | 19 | 27 | 28 | 0% | 1 | 35.43 | Township |
Wabash township is the largest city in Wabash County, with a population of 65,368.
Wabash township is the smallest city in Wabash County.
There are 19 cities in Wabash County, Indiana.