1904 U.S. National Championships – Women's singles

May Sutton won the singles tennis title of the 1904 U.S. Women's National Singles Championship by defeating reigning champion Elisabeth Moore 6–1, 6–2 in the challenge round. Sutton had won the right to challenge Moore by defeating Helen Homans 6–1, 6–1 in the final of the All Comers' competition. The event was played on outdoor grass courts and held at the Philadelphia Cricket Club in Wissahickon Heights, Chestnut Hill, Philadelphia from June 21 through June 25, 1904.