Union is a home-rule-class city in Boone County, Kentucky, United States. The population was 7,416 . The area was rural until residential growth in the 1990s and 2000s. Union is located southwest of Cincinnati, Ohio.
union is a home-rule-class city in boone county kentucky united states the population was 7416  the area was rural until residential growth in the 1990s and 2000s union is located southwest of cincinnati ohio