11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Selmer | 1 | 4,498 | 4,458 | 0.18% | 471 | 9.55 | Town |
| Adamsville | 2 | 2,285 | 2,262 | 0.22% | 325 | 7.04 | Town |
| Eastview | 3 | 783 | 773 | 0.26% | 153 | 5.12 | Town |
| Bethel Springs | 4 | 755 | 739 | 0.4% | 338 | 2.23 | Town |
| Michie | 5 | 674 | 658 | 0.45% | 120 | 5.62 | Town |
| Guys | 6 | 423 | 413 | 0.47% | 37 | 11.39 | Town |
| Stantonville | 7 | 351 | 335 | 0.86% | 311 | 1.13 | Town |
| Ramer | 8 | 328 | 327 | 0% | 183 | 1.79 | City |
| Milledgeville | 9 | 279 | 273 | 0.36% | 174 | 1.61 | Town |
| Finger | 10 | 275 | 274 | 0% | 175 | 1.57 | City |
| Chewalla | 11 | 146 | 66 | 7.35% | 109 | 1.34 | CDP |
Selmer is the largest city in McNairy County, with a population of 4,498.
Chewalla is the smallest city in McNairy County.
There are 11 cities in McNairy County, Tennessee.