Ivan Ljubičić (Croatian pronunciation: ; born March 19, 1979) is a Bosnia-born Croatian tennis player. His career-high ATP Entry ranking was No. 3, and his current Entry list ranking is No. 43 (as of October 2009).

Tall and powerfully built, he is noted for his strong serve and has achieved his best results in indoor tournaments played on carpet or hardcourt. He often plays from the baseline, although he is capable of playing at the net. Ljubičić is using the Head Microgel Extreme Pro Racquet, after using the Babolat Pure Drive for most of his professional career.

Ljubičić currently serves as the ATP Player Council president, and has strongly voiced his opinion on many issues, such as the possible downgrading of current Masters Series tournaments in Monte Carlo and Hamburg.