The Staines–Windsor line is a 6 mi 46 ch (10.6 km) railway line in Berkshire and Surrey, England. It branches from the Waterloo–Reading line at Staines-upon-Thames and runs to its western terminus at Windsor via intermediate stations at Wraysbury, Sunnymeads and Datchet. All of the stations are managed by South Western Railway, which operates all passenger trains. Most services run between Windsor & Eton Riverside station and London Waterloo via Richmond and Clapham Junction.

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.