Upper Darby High School Model UN is the high school’s very own MUN team. Established in 2024, the club has served as the connection between students' interest in international politics at UDHS and conferences within the Greater Philadelphia Area. The delegation from UDHS typically attends MUN conferences in the South Jersey area, with the most prominent conferences including, but not limited to, South Jersey Model United Nations (SJMUN) at Eastern Regional High School, Quaker Model United Nations Conference (QMUNC) at Moorestown Friends School, and Haddonfield Model United Nations (HadMUN) at Haddonfield Memorial High School, among others.