Elizabeth Sanderson Haldane (27 May 1862 - 24 December 1937) was an eminent public figure, author, biographer, philosopher, suffragist, nursing administrator, and social welfare worker. She was the sister of Richard Burdon Haldane, 1st Viscount Haldane and John Scott Haldane, and became the first female Justice of the Peace in Scotland in 1920. She was made a Companion of Honor in 1918.