The Eastern Suburbs Railway (ESR) is a commuter railway line in Sydney constructed in the 1970s. It is operated by Sydney Trains and has stations at Martin Place, Kings Cross, Edgecliff and Bondi Junction. In addition, it has dedicated platforms at Town Hall, Central and Redfern stations. All of these stations are underground. The Eastern Suburbs railway connects with the Illawarra line at Erskineville, forming the Eastern Suburbs & Illawarra Line. The line features turnbacks at Central, Martin Place and Bondi Junction. There was also previously a rarely used cross-over at Edgecliff. It operates a service every 3 to 5 minutes during weekday peak hours and 8 to 10 minutes at all other times.

Martin Place railway station is a heritage-listed underground commuter rail station located on the Eastern Suburbs line, serving the Sydney central business district in New South Wales, Australia. Named after Martin Place, it is served by Sydney Trains T4 Eastern Suburbs & Illawarra Line services and NSW TrainLink South Coast Line services. It was designed by Fowell, Mansfield Jarvis and McLurcan and built from 1973 to 1979. It was added to the New South Wales State Heritage Register on 2 April 1999.