Anna Klasen (born 15 November 1993) is a German tennis player. She has a career-high singles ranking by the Women's Tennis Association (WTA) of 426, achieved on 6 April 2015, and a doubles ranking of 341, achieved on 19 September 2016. Klasen has won two singles titles and 14 doubles titles on the ITF Circuit. Her younger sister is also a professional tennis player. Klasen made her WTA Tour main-draw debut at the 2022 Hamburg European Open in the doubles draw, partnering Tamara Korpatsch.