Union
- County:
- Greene County
- County Seat:
- No
- Area (mi²):
- 0.821
- State:
- Alabama
Union is a town located in Greene County, Alabama. Union has a 2026 population of 167. Union is currently declining at a rate of -2.34% annually and its population has decreased by -7.73% since the most recent census, which recorded a population of 181 in 2020.
The median age in Union is 55.2 years: 40.5 years for males, and 60.6 years for females. For every 100 females there are 79.7 males.