Louise McKinney (née Crummy; 22 September 1868 – 10 July 1931) was a Canadian politician, temperance advocate, and women's rights activist. She was the first woman elected into the Legislative Assembly of Alberta and the first woman to serve in a legislature in the British Empire. She served in the Alberta legislature from 1917 to 1921 as a member of the Non-Partisan League. Later she was one of the Famous Five who campaigned successfully for the right of Canadian women to be appointed to the Senate. A former schoolteacher and temperance organizer, she came to Alberta in 1903 as a homesteader.

McKinney was heavily involved in the Woman's Christian Temperance Union, and she served as president of the Alberta branch for 22 years, from 1908 to 1930. In 1930, she was elected president of the Dominion WCTU, and organized the 1931 World Convention in Toronto. McKinney supported stricter immigration laws and the creation of institutions for "feeble-minded" people. In 2009, the Senate of Canada voted to make McKinney and other members of the Famous Five Canada's first honorary Senators.