Elizabeth Ann or Anne Plankinton (July 27, 1853 – 1923) was an American philanthropist in the early 20th century, the daughter of Milwaukee businessman John Plankinton. She was also known as "Miss Lizzie" and the people of Milwaukee called Plankinton the "municipal patroness" because of her generosity. She made a large donation that built the first YWCA in Milwaukee. She also purchased an elaborate large-scale pipe organ for the newly constructed city auditorium.