Langley, also known as Langley Marish, is an area of Slough in Berkshire, South East England. It is east of Slough town centre and west of Charing Cross in Central London. It was a separate civil parish and village until the 1930s, when the built-up part of Langley was incorporated into Slough. Langley was in the historic county of Buckinghamshire, being transferred to the administrative county of Berkshire in 1974.
The place-name Langley derives from two Middle English words: lang meaning long and leah, a wood or clearing. Langley was formed of a number of clearings: George Green, Horsemoor Green, Middle Green, Sawyers Green and Shreding Green. They became the sites for housing which merged into one village centred on the parish church in St Mary's Road. The clearings are remembered in the names of streets or smaller green fields.
Marish or Maries commemorates Christiana de Marecis who held the manor for a short time in the reign of Edward I.