José F. Bonaparte (born 14 June 1928) is a paleontologist from Argentina. He has discovered and named many new dinosaurs from South America, including Noasaurus, Carnotaurus, Saltasaurus, Kritosaurus, Alvarezsaurus, Riojasaurus, and many, many others. He also discovered or described a number of archosaurs and primitive birds (such as Iberomesornis) and has assisted with the study of other dinosaurs, like Giganotosaurus.
He was born in Rosario, Argentina, and grew up in Mercedes, Buenos Aires. Despite a lack of formal training in paleontology, he started collecting fossils at an early age, and created a museum in his home town. Bonaparte is considered to be one of the greatest and most successful modern paleontologists. He was Professor of Palaeozoology at the Universidad Nacional de Tucumán from 1975 to 1979, and director of the palaeovertebrate section between 1960 and 1978.