Greenham is a village and civil parish in Berkshire, England. It was recorded in the Domesday Book as Greneham. Greenham commences immediately south-east of Newbury and is in the West Berkshire district of England.

The former Royal Air Force station RAF Greenham Common covers much of the south-east of the civil parish of the village, surrounded by the Common which covers most of the parish.

Opened in 1942, it was used by both the Royal Air Force and United States Army Air Forces during the Second World War and the United States Air Force during the Cold War, also as a base for nuclear weapons. After the Cold War ended, it was closed in September 1992.

The airfield was also known for the Greenham Common Women's Peace Camp held outside its gates in the 1980s in protest against the stationing of cruise missiles on the base.

In 1997 Greenham Common was designated as public parkland, effectively returning it to its pre-WW2 status but with restrictions. Greenham and Crookham Commons became a Site of Special Scientific Interest. The Cold War era control tower has recently been redeveloped and is now open as a visitor centre with a historical exhibition and community cafe. Cattle from local farms are permitted to graze the Common and often stray onto the adjacent Burys Bank Road.