Omar Jasika (Bosnian pronunciation: [jǎsika]; born 18 May 1997) is an Australian professional tennis player. Jasika has a career-high singles ranking of World No. 179 achieved on 16 December 2024 and a career-high doubles ranking of World No. 220 achieved on 23 May 2016.
Jasika is the 2014 US Open boys' singles champion. He along with Naoki Nakagawa also won the 2014 US Open boys' doubles title defeating Rafael Matos and João Menezes in the final. In winning both, Jasika became the first player in 28 years to win both the boys’ singles and doubles events at the US Open.