Fanny Östlund (born 5 May 1997) is a Swedish tennis player.
Östlund has a career-high singles ranking by the Women's Tennis Association (WTA) of 406, achieved on 15 January 2024. She also has a career-high WTA doubles ranking of 210, achieved on 1 January 2024. She has won three singles titles and 15 doubles titles on the ITF Circuit.
Östlund competes for Sweden in the Billie Jean King Cup, where she has a win/loss record of 0–1.