Andor Deli was born into an ethnic Hungarian family in Bečej, SFR Yugoslavia (; today Serbia) on 2 May 1977. He attended the University of Novi Sad Faculty of Law, where earned a degree of jurist in 2000. He won a research scholarship to the Europa-Institut at Saarland University for a trimester in 2003. He passed a judicial examination in 2004. He earned a master's degree at the University of Novi Sad in 2008.
