The St. George Illawarra Dragons are an Australian professional rugby league football club, representing both the Illawarra and St George regions of New South Wales. The club has competed in the National Rugby League (NRL) since 1999 after a joint-venture was formed between the St. George Dragons and the Illawarra Steelers. The club officially formed as the game's first joint-venture club on 23 September 1998 and remains the only inter-city team in the NRL. The team has its headquarters and leagues clubs in both Wollongong and the Sydney suburb of Kogarah, and trains and plays games regularly at WIN Stadium in Wollongong, as well as at Jubilee Oval in Kogarah. From 1999 to 2006 the club was jointly owned by the St. George Dragons 50% and Illawarra Steelers 50%. In 2006 WIN Corporation purchased 50% of the Illawarra Steelers stake in the club before purchasing the rest of the Illawarra Steelers' share in August 2018.

Rugby league football, commonly known as rugby league in English-speaking countries and rugby XIII in non-Anglophone Europe and South America, and referred to colloquially as rugby, football, footy or league in its heartlands, is a full-contact sport played by two teams of thirteen players on a rectangular field measuring 68 m (74 yd) wide and 112–122 m (122–133 yd) long with H-shaped posts at both ends. It is one of the two major codes of rugby football, the other being rugby union. It originated in 1895 in Huddersfield, Yorkshire, England, as the result of a split from the Rugby Football Union (RFU) over the issue of payments to players. The rules of the game governed by the new Northern Rugby Football Union progressively changed from those of the RFU with the specific aim of producing a faster and more entertaining game to appeal to spectators, on whose income the new organisation and its members depended.