Helen Fairchild (November 21, 1885 – January 18, 1918) was an American nurse who served as part of the American Expeditionary Force during World War I, and who became known for her wartime letters to her family in the U.S., which vividly depicted the realities of combat nursing during World War I. She died of post-operative complications after surgery for a gastric ulcer while on duty with British base hospital #10/#16 on the Western Front.