19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Wabash | 1 | 67,844 | 64,268 | 1.75% | 1,403 | 48 | Township |
| Noble | 2 | 13,696 | 13,860 | -0.14% | 167 | 82 | Township |
| Wabash | 3 | 10,237 | 10,427 | -0.37% | 1,061 | 10 | City |
| Chester | 4 | 6,967 | 7,001 | 0% | 107 | 65 | Township |
| Wabash | 5 | 6,754 | 6,541 | 0.78% | 188 | 36 | Township |
| North Manchester | 6 | 5,229 | 5,269 | -0.15% | 1,475 | 4 | Town |
| Lagro | 7 | 2,736 | 2,725 | 0.29% | 34 | 81 | Township |
| Pleasant | 8 | 2,390 | 2,373 | 0.38% | 44 | 54 | Township |
| Paw Paw | 9 | 1,560 | 1,554 | 0.26% | 39 | 40 | Township |
| Waltz | 10 | 1,214 | 1,206 | 0.33% | 28 | 43 | Township |
| La Fontaine | 11 | 801 | 803 | -0.12% | 1,311 | 1 | Town |
| Wabash | 12 | 796 | 773 | 0.25% | 29 | 27 | Township |
| Wabash | 13 | 700 | 692 | 0.86% | 21 | 33 | Township |
| Wabash | 14 | 530 | 538 | 0.38% | 23 | 23 | Township |
| Roann | 15 | 435 | 437 | -0.23% | 1,883 | 0 | Town |
| Lagro | 16 | 348 | 348 | 0% | 587 | 1 | Town |
| Somerset | 17 | 256 | 380 | -3.76% | 376 | 1 | CDP |
| Laketon | 18 | 212 | 445 | -11.3% | 201 | 1 | CDP |
| Wabash | 19 | 31 | 31 | 0% | 1 | 35 | Township |
Wabash is the largest city in Wabash County, with a population of 67,844.
Wabash is the smallest city in Wabash County, with a population of 31.
There are 19 cities in Wabash County, Indiana.