1997–2010: The District of West Wiltshire wards of Adcroft, Bradford-on-Avon North, Bradford-on-Avon South, college, Corsley, Dilton Marsh, Drynham, Ethandune, Holt, John O'Gaunt, Manor Vale, Mid Wylye Valley, Park, Paxcroft, Shearwater, Summerham, Warminster East, Warminster West, Weavers, Westbrook, Westbury with Storridge, and Wylye Valley, and the District of Salisbury wards of Knoyle, Mere, and Western.

At the time of the constituency's abolition in 2010 it included the towns of Westbury, Warminster, Trowbridge, and Bradford-on-Avon, and the surrounding rural areas as far south as Mere.

Following a review of parliamentary representation in Wiltshire, the Boundary Commission for England created two new constituencies in the county.

The 1868 election was declared void on petition, due to intimidation of the electorate, causing a by-election.

The political parties had been making preparations for an election to take place and by the Autumn of 1939, the following candidates had been selected; Craig, F. W. S. (1983).