Mari Tanaka (田中 麻里, Tanaka Mari, born January 11, 1987) is a former Japanese tennis player. In her career, she won four singles and 18 doubles titles on the ITF Women's Circuit. In August 2013, she reached her highest singles ranking of world No. 287. On 12 May 2014, she peaked at No. 189 in the doubles rankings by the Women's Tennis Association (WTA).