Sir George-Étienne Cartier, 1st Baronet, (pronounced [ʒɔʁʒ etjɛn kaʁtje]; September 6, 1814 – May 20, 1873) was a Canadian statesman and Father of Confederation. The English spelling of the name—George, instead of Georges, the usual French spelling—is explained by his having been named in honour of King George III.

In the years leading up to Confederation, Cartier was a dominant figure in the politics of Canada East as leader of the Parti bleu. In 1838 he returned to Montreal after a year in exile for his role in the Lower Canada Rebellion. He officially entered politics in 1848. During his long career he promoted the establishment of the Civil Code as the formal law of Canada East, instead of sole use of common law as was present in Canada West. He also promoted the introduction of primary education in the province. Cartier had several reasons for supporting Confederation, notably his fear of American expansion. He died in London, England, on May 20, 1873. Cartier is considered to be one of the most important of the Fathers of Confederation, along with Macdonald and George Brown. He has been dubbed “The Kingpin of Confederation” because of his prominence.