7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Meridian | 1 | 33,218 | 34,872 | -0.99% | 618 | 54 | City |
| Collinsville | 2 | 1,742 | 1,467 | -0.8% | 122 | 14 | CDP |
| Marion | 3 | 1,667 | 1,739 | -0.89% | 461 | 4 | Town |
| Nellieburg | 4 | 1,298 | 1,297 | -0.61% | 183 | 7 | CDP |
| Toomsuba | 5 | 717 | 623 | -0.42% | 153 | 5 | CDP |
| Meridian Station | 6 | 424 | 450 | -9.4% | 256 | 2 | CDP |
| Lauderdale | 7 | 157 | 270 | -10.8% | 55 | 3 | CDP |
Meridian is the largest city in Lauderdale County, with a population of 33,218.
Lauderdale is the smallest city in Lauderdale County, with a population of 157.
There are 7 cities in Lauderdale County, Mississippi.