Union County
Also known as Union County, KY, Union County, Kentucky
county in Kentucky, United States
Key facts
- Country
- United States
- State
- Kentucky
- Founded
- January 15, 1811
- Seat
- Morganfield
- Largest city
- Morganfield
- Judge executive
- Adam O'Nan (R)
- Total
- 363.38 sq mi (941.1 km )
- Land
- 342.85 sq mi (888.0 km )
- Water
- 20.53 sq mi (53.2 km ) 5.6%
- Estimate 2025
- 12,839
- Density
- 39.866/sq mi (15.392/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
Article
Union County is a county in the U.S. state of Kentucky. As of the 2020 census, the population was 13,668. Its county seat is Morganfield. The county was created effective January 15, 1811.
The county is located on the east bank of the Ohio River opposite its confluence with the Wabash River. Union County, along with neighboring Posey County, Indiana, and Gallatin County, Illinois, form the tri-point of the Illinois–Indiana–Kentucky tri-state area.