The South West Rail Link is a railway line serving the developing suburbs of south-western Sydney, Australia between Glenfield and Leppington.

The line consists of a 11.4 km (7.1 mi) double-track railway, with stations in the suburbs of Leppington and Edmondson Park.

The line is the major piece of public transport infrastructure for the Sydney metropolitan area's "South West Growth Centre".

The three projects were to be integrated into a single operational sector, with trains from the south-west running to the north-west via the CBD Link.

[4] On 14 November 2009, Premier Nathan Rees announced that construction of stage two of the South West Rail Link would begin in mid-2010, with completion scheduled for 2016.

[7] On 7 December 2010, Premier Kristina Keneally announced that a contract for design and construction of stage two had been awarded to the John Holland Group.

[12] On 13 September 2014, the NSW Government announced that construction was complete, saying the line had come in $300 million under budget and a year ahead of schedule.

All T2 and T5 Cumberland Line services via Liverpool and Glenfield no longer operate to Campbelltown and were rerouted via South West Rail Link to start or terminate at Leppington.

[25] In June 2015, the New South Wales government announced details for a plan to preserve corridors for extensions of the line.

[29] The study's final report was released in March 2018 and included a proposal to build a "North-South Link" from Schofields to Macarthur via the airport.