Swansea City Association Football Club is a professional football club based in Swansea, Wales, currently playing in the Football League Championship. Formed in 1912, they joined the Football League in 1920, and have been members ever since. They played in old Football League First Division period of 1981–83; finishing as high as 6th in their first season.
Since 2005 Swansea City have played their home games at the Liberty Stadium, a ground they share with the Ospreys Rugby Union Club. Before 2005 the club's home ground was Vetch Field.
Swansea City and its supporters are unofficially known as the 'Jacks'. One explanation for this name is that during the 17th century, sailors from Swansea were respected and any 'Swansea Jack' was allowed to join the crew based simply on the town's reputation for good sailors. Many, however, believe that the name originates from the renowned life-saving dog Swansea Jack.