3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| New Albany | 1 | 7,758 | 7,627 | 0.34% | 425 | 18.23 | City |
| Myrtle | 2 | 490 | 484 | 0.2% | 235 | 2.08 | Town |
| Blue Springs | 3 | 441 | 436 | 0.23% | 99 | 4.48 | Village |
New Albany is the largest city in Union County, with a population of 7,758.
Blue Springs is the smallest city in Union County.
There are 3 cities in Union County, Mississippi.