The 2015 West Dorset District Council election was held on Thursday 7 May 2015 to elect councillors to West Dorset District Council in England. It took place on the same day as the general election and other district council elections in the United Kingdom. A series of boundary changes saw the number of councillors reduced from 48 to 44.
These were the final elections of the district council, before its abolition on 1 April 2019 when it was merged with the other districts of Dorset and Dorset County Council to form a new unitary authority Dorset Council.
The 2015 election saw the Conservatives maintain majority control of the council taking 30 of the 44 seats up for election.
A by-election was held for the Piddle Valley ward of West Dorset District Council on 13 April 2017 following the resignation of Conservative councillor Peter Hiscock.
A by-election was held for one of the two seats in the Lyme Regis & Charmouth ward of West Dorset District Council on 14 September 2017 following the resignation of Conservative councillor George Symonds.
A by-election was held for one of the three seats in the Bridport North ward of West Dorset District Council on 22 February 2018 following the resignation of Liberal Democrat councillor Ros Kayes.