Kings Cross railway station is located on the Eastern Suburbs line, serving the Sydney suburb of Kings Cross. It is served by Sydney Trains T4 Eastern Suburbs & Illawarra Line services and NSW TrainLink South Coast Line services.

The South Coast Line (SCO) is an intercity rail service operated by NSW TrainLink that services the Illawarra region of New South Wales, Australia. The service runs from Central, and runs the entire length of the eponymous South Coast railway line to Bomaderry. The service also runs along the Eastern Suburbs railway line at peak hours and the Port Kembla railway line to Port Kembla. It is operated with NSW TrainLink H sets and Sydney Trains T sets, with Endeavour railcars operating the service on the non-electrified line between Kiama and Bomaderry.