Coordinates: 51°29′01″N 0°31′20″W / 51.4835°N 0.5221°W / 51.4835; -0.5221
Colnbrook is a village in the unitary authority of Slough in Berkshire, England. It was formerly in the historic county of Buckinghamshire. It straddles the Colne Brook and Wraysbury River which join on its southwest border (two distributaries of the Colne). It is centred 3 miles (4.8 km) southeast of Slough, 8 km (5.0 mi) east of Windsor and 18 miles (29 km) west of central London.
Colnbrook is the most part of the civil parish of Colnbrook with Poyle (see also Poyle). Junctions of the M4 and M25 are near the village. To the east is Longford, London, and Bedfont and Stanwell which abut the south of London Heathrow Airport.
Colnbrook with Poyle is a suburban parish with significant industrial units, logistical premises and open land. The parish was created on 1 April 1995 as an amalgamation of Colnbrook from Iver to the north and the smaller Poyle from an unparished area of Stanwell to the south-east. At the 2011 census the whole civil parish had a population of 6,157 living in 2,533 homes.