Donald James Grimes (born 4 October 1937) is an Australian politician, diplomat and doctor. He is a member of the Labor Party. He was a Senator for Tasmania from 1974 to 1987. He served as a minister in the Hawke Government as Minister for Social Security (1983–1984) and Minister for Community Services (1984–1987). He also served as Australian Ambassador to the Netherlands from 1987 to 1991.