Stupar is a Serbian/Bosnian/Croatian surname.
Notable people with this surname include: Jonathan Stupar (born 1984), American football tight end Milan Stupar (born 1980), Serbian footballer Miloš Stupar, Bosnian Serb commander Myroslav Stupar (born 1941), Ukrainian footballer and referee Nate Stupar (born 1988), American football linebacker Paul Stupar (1866 – 1928), Austro-Hungarian admiral Slobodanka Stupar (born 1947), Serbian visual artist Tanja Stupar-Trifunović (born 1977), Bosnian-Serbian writer