Adrian Ioana (born 18 January 1981, Târgu Jiu) is a Romanian mathematician.^[1] He is currently a professor at the University of California, San Diego.

Ioana earned a BS in Mathematics from the University of Bucharest in 2003, and completed his PhD at the University of California, Los Angeles in 2007, under the supervision of Sorin Popa. He then was a 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.^[1]

For his contributions to von Neumann algebras and representation theory of groups, he was awarded a 2012 EMS Prize. In 2018 he was an invited speaker at the International Congress of Mathematicians (ICM) in Rio de Janeiro (on "Rigidity for von Neumann algebras").