Sanja Ančić (born 18 July 1988) is a Croatian professional tennis player born in Split. Ančić plays right handed, has a two-handed backhand and is the sister of professional tennis player Mario Ančić.

She has not won any WTA Tour tournaments yet, but managed to win a total of eight ITF tournaments in singles and one in doubles. She played alongside her brother in the 2007 Hopman Cup. Her highest singles ranking is 159th which she reached on 11 September 2006, while on 18 December 2006 she reached her highest doubles ranking, position 250.