Adrian Ioana (born 18 January 1981, Târgu Jiu) is a Romanian mathematician. He is currently a professor at the University of California, San Diego. Ioana earned a B.S. in Mathematics from the University of Bucharest in 2003, and completed his Ph.D. at the University of California, Los Angeles in 2007, under the supervision of Sorin Popa. He then was an postdoc at the California Institute of Technology and a Research Fellow supported by the Clay Mathematics Institute, after which he joined UC San Diego in 2011.