Jeffersontown is a home rule-class city in Jefferson County, Kentucky, United States. The population was 26,595 at the 2010 U.S. census. It is a major suburb of Louisville. When the Louisville Metro government was established in 2003, Jeffersontown chose to retain its status as an independent city. It is the metro area's largest municipality outside Louisville. Locally, the city is often referred to by the abbreviated name J-town.