Whiteley is a planned community of 6,500 homes in the county of Hampshire, England, United Kingdom near Fareham. The development straddles the boundary between two council districts: the Borough of Fareham to the south and west, and the City of Winchester to the north and east.

Whiteley is located in southern Hampshire between the cities of Portsmouth and Southampton and close to the market town of Fareham. The development is situated close to Junction 9 of the M27 motorway. Rail services are provided from Swanwick railway station to the south - services between London Victoria/Portsmouth and Southampton via Hamble, or Botley railway station to the north - services between London Waterloo and Portsmouth via Eastleigh. Cycle tracks interconnect the town with the two stations, and a Bus 28a connects to Swanwick and on to Fareham Bus Station.

Historically, the site now occupied by Whiteley was farmland and coppice. The nearest historical settlements are those of Park Gate situated just south of Swanwick Hill, Little Park to the South, Swanwick to the West, Botley and Curdridge to the North.

Farm land taken over by the initial development included Rookery, Yew Tree, Sweethills and Whiteley. North Whiteley development was based on land released by Bury, Bridge and Barn Farms. Barn Farmhouse which remains in North Whiteley is listed by Historic England as a C17 timber frame house with a C18 extension.

The wooded areas in Whiteley were used to provide shelter to troops in the build-up of forces for transportation to northern France in preparation for D-Day during the second world war. This is evidenced by the remains of a War Department water tank on the edge of the Bere Forest to the north of the community.

Part of the M27 motorway constructed to the south of the development was opened in February 1978.

In the early 1980s Hampshire County Council developed draft proposals for land north of what was then known as the western wards of Fareham. The new community was to be known as Whiteley after the name of the farm that lay in the centre of the development area. This development comprised 3,300 houses 16,500 m2 of offices and 7,500 m2 of retail, plus a community centre and a junior school.

Construction of the Solent business park started in the mid-1980s and the first houses were completed in the late 1980s, although construction slowed for a few years following a crash in the British residential property market during the mid-1990s. From 1996 construction recommenced, but has been paused since 2020 (covid epidemic).