Harriet Slater CBE, née Evans, (1903 – 12 October 1976) was a British Labour and Co-operative politician. Educated at Hanley High School and Dudley Teachers’ Training College, Slater was National Organiser for the Cooperative Party from 1942 to 1953, and a local councillor in Stoke-on-Trent from 1933 to 1965. She was elected Member of Parliament (MP) for Stoke-on-Trent North at a by-election in 1953, and served until her retirement at the 1966 general election. From 1964 to 1966, she was a Government whip with the formal title of Lord of the Treasury.