Langley, also known as Langley Marish, is an area of Slough in Berkshire, England. It is two miles (3 km) east of Slough town centre and 18 miles (29 km) 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.

Slough is a town in Berkshire, England, in the Thames Valley 20 miles (32 km) west of central London and 19 miles (31 km) north-east of Reading, at the intersection of the M4, M40 and M25 motorways. It is part of the historic county of Buckinghamshire. In 2021 Census, the population of the town was 143,184. In 2021, the wider Borough of Slough had a population of 158,500. Slough borders the ceremonial counties of Greater London and Buckinghamshire.