Iustin

Iustin is a Romanian-language masculine given name that may refer to:


 * Iustin Doicaru (born 2007), Romanian footballer
 * Iustin Dyadkovsky (1784–1841), Russian physician, psychotherapist, rationalist, natural philosopher and Moscow University professor
 * Iustin Frățiman (1870–1927), Russian Empire/Romanian historian, educator, librarian and political figure
 * Iustin Moisescu or Patriarch Iustin of Romania (1910–1986), former Patriarch of the Romanian Orthodox Church
 * Iustin Popescu (born 1993), Romanian footballer
 * Justin Popović (1894–1979), sometimes spelled Iustin, Serbian Orthodox theologian, archimandrite of the Ćelije Monastery, Dostoyevsky scholar, writer, anti-communist advocate and critic of the pragmatic church ecclesiastical life
 * Iustin Răducan (born 2005), Romanian footballer