Louisville (/ˈluːəvəl/ ( listen ) LOO-ə-vəl, /ˈluːivɪl/ ( listen ) LOO-ee-vil, /ˈlʊvəl/ ( listen ) LUUV-əl ) is the largest city in the Commonwealth of Kentucky and the 29th most-populous city in the United States. It is one of two cities in Kentucky designated as first-class, the other being Lexington, the state's second-largest city. Louisville is the historical seat and, since 2003, the nominal seat of Jefferson County, on the Indiana border.