Harrods Creek, Louisville merged with what most populous county in Kentucky in 2003?
Jefferson County, Kentucky Jefferson County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 741,096. It is the most populous county in Kentucky and is more than twice as large as the second most populous, Fayette. The county was formed in 1780 and named for future President Thomas Jefferson, who was Governor of Virginia at the time.
Shepherdsville, Kentucky Shepherdsville is a home rule-class city on the Salt River in Bullitt County, Kentucky, in the United States. It is the seat of its county, located just south of Louisville. The population was 11,222 during the 2010 U.S. Census.