The Flemington Maintenance Depot is the largest Sydney Trains depot, located in the western Sydney suburb of Lidcombe, but named after the suburb of Flemington further east.

[1] The depot features 20 storage roads, 10 of which are under the main shed, a lift shop, wheel lathe and a train washing facility.

The depot has rail connections to all tracks of the Main Suburban Line, as well as the Sydney Freight Network.

NSW TrainLink Endeavours and XPTs occasionally visit to use the wheel lathe.

Until May 1968, it was responsible for maintaining the long-distance HUB, RUB and stainless steel carriages.