| Knight Reservoir | |
|---|---|
 Input station for Knight and Bessborough Reservoirs | |
  Knight Reservoir | |
| Location | Surrey |
| Coordinates | 51°23′56.6″N 0°23′36.2″W / 51.399056°N 0.393389°W |
| Type | reservoir |
| Basin countries | United Kingdom |
| Surface area | 50.5 ha (125 acres) |
| Water volume | 5.46 Gl (1.20×109 imp gal) |
The Knight Reservoir is a large pumped storage reservoir located in the Borough of Elmbridge in Surrey. It was inaugurated in 1907 and stores up to 2,180 million litres of raw water abstracted from the River Thames prior to its treatment and supply to London and north Surrey. It is located south of the River Thames, west of West Molesey, and between Hurst Road (A3050) and Walton Road (B369). It is adjacent to, and west of, its twin Bessborough Reservoir.