Union
- County:
- Sheridan County
- County Seat:
- No
- Area (mi²):
- 35.695
- State:
- Kansas
Union is located in Sheridan County, Kansas. Union has a 2025 population of 23 . Union is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 23 in 2020.
The median age in Union is 69.2 years: 0 years for males, and 0 years for females. For every 100 females there are 381.8 males.