Tavistock was the name of a parliamentary constituency in Devon between 1330 and 1974. Until 1885 it was a parliamentary borough, consisting solely of the town of Tavistock; it returned two Members of Parliament to the House of Commons of the Parliament of the United Kingdom until 1868, when its representation was reduced to one member. From 1885, the name was transferred to a single-member county constituency covering a much larger area.

Tavistock is an ancient stannary and market town within West Devon, England. It is situated on the River Tavy from which its name derives. At the 2011 census the three electoral wards had a population of 13,028. It traces its recorded history back to at least 961 when Tavistock Abbey, whose ruins lie in the centre of the town, was founded. Its most famous son is Sir Francis Drake.