West Dorset District Council in Dorset, England existed from 1973 to 2019. The council was abolished and subsumed into Dorset Council in 2019.
Since 1973 political control of the council has been held by the following parties:
|No overall control||1987–2003|
|2003||25||12||11||(New ward boundaries)|
|2015||30||12||0||(New ward boundaries)|
By-elections occur when seats become vacant between council elections. Below is a summary of by-elections from 1997 to 2019; full by-election results can be found by clicking on the by-election name.
|By-election||Date||Incumbent party||Winning party|
|Thorncombe by-election||17 April 1997||Conservative||Conservative|
|Bridport South by-election (2 seats)||1 May 1997||Labour||Labour|
|Yetminster by-election||1 May 1997||Liberal Democrats||Conservative|
|Chickerell by-election||10 July 1997||Conservative||Liberal Democrats|
|Cam Vale by-election||2 May 2013||Conservative||Conservative|
|Piddle Valley by-election||13 April 2017||Conservative||Conservative|
|Lyme Regis & Charmouth by-election||14 September 2017||Conservative||Independent|