3 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| New Albany | 1 | 7,779 | 7,629 | 0.32% | 427 | 18 | City |
| Myrtle | 2 | 490 | 483 | 0.2% | 235 | 2 | Town |
| Blue Springs | 3 | 441 | 434 | 0.23% | 99 | 4 | Village |
New Albany is the largest city in Union County, with a population of 7,779.
Blue Springs is the smallest city in Union County, with a population of 441.
There are 3 cities in Union County, Mississippi.