This is a list of parliamentary by-elections in Great Britain held between 1754 and 1774, with the names of the previous incumbent and the victor in the by-election. In the absence of a comprehensive and reliable source for party and factional alignments in this period, no attempt is made to define them in this article. The House of Commons: 1754–1790 provides some guidance on the complex and shifting political relationships, but it is significant that the compilers of that work make no attempt to produce a definitive list of each member's allegiances.