Susan Langstaff Mitchell (5 December 1866[1] – 4 March 1926) was an Irish writer and poet, known for her satirical verse.

[4] In Dublin, Mitchell lived next door to the artist Sarah Purser and her family, and she attended a private school on Morehampton Road run by Harriett Abbott.

[3] Mitchell later attended Trinity College Dublin, taking the TCD women's examination with honours.

In 1884, she moved to Birr, in Offaly, to be with her aunts but, although a Protestant, she soon rebelled against their unionist beliefs and became a supporter of Home Rule.

[5][6] In 1897 she began teaching in Sligo, but it was an unhappy time for her as her fiancé George Douglas Crooke died and she was diagnosed with tuberculosis.

After her return to Dublin she worked as a journalist and became assistant editor of the Irish Homestead, under George Russell.