West Berkshire is a district municipality organized as a unitary authority in the county of Berkshire, England. It is located in the western section of the county. The principal town is Newbury and the other main centres in the district include Thatcham, Hungerford, Pangbourne and Lambourn. Larger villages include Theale, Purley-on-Thames, Burghfield, Mortimer and Hermitage.
West Berkshire is home to the UK Atomic Weapons Establishment, based near Aldermaston to the east of the district and, also, the worldwide headquarters of Vodafone on the outskirts of Newbury. The area around Lambourn in the far west of the district is noted for its numerous horse racing stables and training grounds.
The district of Newbury was formed on 1 April 1974, as a merger of the borough of Newbury, Bradfield Rural District, Hungerford Rural District and Newbury Rural District, along with part of Wantage Rural District.
Until 1 April 1998, Newbury District Council and Berkshire County council were responsible for the region at local government level. On 1 April 1998, Berkshire County Council was abolished and Newbury District Council changed its name to West Berkshire Council and took on the former County Council's responsibilities within its area.