Union township
- County:
- Republic County
- County Seat:
- No
- Area (mi²):
- 35.828
- State:
- Kansas
Union township is located in Republic County, Kansas. Union township has a 2026 population of 28. Union township 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 28 in 2020.