Somerset and Dorset West was a European Parliament constituency covering all of Somerset in England, plus parts of Avon and western Dorset.

Prior to its uniform adoption of proportional representation in 1999, the United Kingdom used first-past-the-post for the European elections in England, Scotland and Wales.

It consisted of the Westminster Parliament constituencies (on their 1983 boundaries) of Bridgwater, Somerton and Frome, Taunton, Wells, West Dorset, Weston-super-Mare, Woodspring, and Yeovil.

[1] The constituency replaced Somerset and parts of Wessex.

These seats became part of the much larger South West England constituency in 1999.