Florence Mary MacArthur (27 October 1893 – 12 January 1972), was an English artist and stage designer who also illustrated a number of books.

Her married name has led to some confusion with children's illustrator Florence Mary Anderson (1889–1945), but MacArthur always used her maiden name for her professional work.

MacArthur's skill and sensitivity as an artist raised her book illustration beyond the purely decorative, distilling the essence and atmosphere of the texts it accompanied.

[4] Throughout the 1930s, she designed for Tyrone Guthrie at the Old Vic: 1933–34 The Cherry Orchard and The Importance of Being Earnest, 1936–37 Love's Labour's Lost and Twelfth Night and, 1937–38 Pygmalion and The King of Nowhere for Esmé Church.

In 1949, she renewed her association with Esmé Church who, in 1944, had accepted the invitation of the Bradford Civic Group to become director of its playhouse in Chapel Street.