Anna Klasen (born 15 November 1993) is a German tennis player.

Klasen has a career-high singles ranking by the Women's Tennis Association (WTA) of world No.

426, achieved on 6 April 2015, and a doubles ranking of No.

Her younger sister Charlotte Klasen was 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.