
Union
- County:
- Boone County
- County Seat:
- No
- Area (mi²):
- 3.598
- State:
- Kentucky
Union is a city located in Boone County, Kentucky. Union has a 2025 population of 7,821. Union is currently growing at a rate of 0.97% annually and its population has increased by 5.05% since the most recent census, which recorded a population of 7,445 in 2020.
The average household income in Union is $161,499 with a poverty rate of 3.34%. The median age in Union is 38.5 years: 35 years for males, and 41.6 years for females.