Feltham marshalling yard, also known as Feltham hump yard, was a large railway marshalling yard designed for the concentration of freight traffic to and from South West London, and for transfer to other marshalling yards in London. It was built on the Waterloo to Reading Line. It opened in 1918 and was closed by British Railways on 6 January 1969.

The Waterloo–Reading line is a National Rail electric railway line between London Waterloo and Reading. The line runs west through a series of South West London suburbs to Reading, in central Berkshire. Its passenger operation is by South Western Railway (SWR), which also manage its stations.