Sara Margery Fry JP (11 March 1874 – 21 April 1958) was a British prison reformer as well as one of the first women to become a magistrate.

It was there that Fry met educationist and fellow relief worker Marjorie Rackstraw, who would become her lifelong friend.

[1] After the First World War, she lived with her brother Roger and began the work on prison reform in which she was to be involved until the end of her life.

[7] Her appointment was hailed as "[combining] intellectual distinction, a fine eloquence, and academic experience with the force of character and sympathy which the post demands.

"[8] The Graduate (Middle Common Room, or MCR) accommodation building at Somerville College is called 'Margery Fry House' in her honour.

[12] In the 1940s/1950s she and her sister Ruth lived together in a large Georgian house in Clarendon Road, W11, surrounded by treasures accumulated from around the world.