The richest county in Kentucky is Jefferson County. The county seat is Louisville, which is the state's largest city and its economic and cultural hub. The county has a population of over 700,000 and an estimated per capita income of $33,000.
Jefferson County's economy is diverse and includes several major industries such as healthcare, manufacturing, logistics, and tourism. The county is home to several Fortune 500 companies including Yum! Brands (the parent company of KFC), Humana, Ford Motor Company, UPS, Papa John's International, Brown-Forman Corporation (makers of Jack Daniel's whiskey), and Kindred Healthcare.
The Louisville metropolitan area has a gross domestic product (GDP) of $125 billion which makes it the 60th largest metropolitan economy in the United States. Jefferson County accounts for about two-thirds of the metro area's GDP.
The county has a long history dating back to 1780 when it was established as one of Kentucky's original counties. It was named after Thomas Jefferson who was then the governor of Virginia. The county covers nearly 400 square miles and includes parts of both the Appalachian Mountains and the Ohio River valley region.