Radonjić () is a Serbian surname, a patronymic derived from the given name Radonja.
Notable people with the surname include: Andrea Radonjić (born 1994), Montenegrin beauty pageant titleholder who was crowned Miss Montenegro Universe 2011 and represented her country in the 2012 Miss Universe Dejan Radonjić (born 1970), Montenegrin former professional basketball player and current head coach Dejan Radonjić (footballer, born 2005), Austrian football defender Goran Radonjić (born 1983), Montenegrin heavyweight kickboxer, captain of Montenegrin kickboxing team Jovan Radonjić (1748–1803), guvernadur of Montenegro between 1764 and 1803 Kristina Radonjić (born 1974), Serbian rhythmic gymnast who competed as Independent Olympic Participant at the 1992 Summer Olympics Miljko Radonjić (1770–1836), Serbian writer, professor at the Belgrade Higher School and politician Nemanja Radonjić (born 1996), Serbian football forward who plays for Olympique de Marseille Nenad Radonjić (born 1996), Serbian football forward who plays for Radnički Beograd, on loan from Voždovac Srđan Radonjić (born 1981), Montenegrin former professional footballer who played as striker Staniša Radonjić (1650s–1720s), Serbian Orthodox priest, chieftain vojvoda of the Njeguši tribe, and serdar of the Prince-Bishopric of Montenegro Stanislav Radonjić (1690–1758), vojvoda, serdar and the first guvernadur (governor) of the Prince-Bishopric of Montenegro from 1756 until he died in 1758, serving Metropolitan Sava II Petrović-Njegoš Vladan Radonjić (born 1979), Serbian professional strength and conditioning coach Vukolaj Radonjić (1765–1832), last Montenegrin guvernadur