SouthLink is an Australian bus service operator in Adelaide. It operates services as part of the Adelaide Metro network under contract to the Government of South Australia. It is a subsidiary of Keolis Downer.

Adelaide Metro is the public transport system of the Adelaide area, around the capital city of South Australia. It is an intermodal system offering an integrated network of bus, tram, and train services throughout the metropolitan area. The network has an annual patronage of 79.9 million, of which 51 million journeys are by bus, 15.6 million by train, and 9.4 million by tram. The system has evolved heavily over the past fifteen years, and patronage increased dramatically during the 2014–15 period, a 5.5 percent increase on the 2013 figures due to electrification of frequented lines.