János Radványi (4 August 1922 – 11 January 2016) was a Hungarian-born American diplomat, politician, political scientist and academic professor, who served as Hungarian Ambassador to the United States between 1962 and 1967, when he applied for asylum.
He entered diplomatic service in 1947 and was posted in Turkey, France, Switzerland, and Syria.
Five years later for political reasons, Ambassador Radványi cut his ties with the Hungarian government and issued a statement that said in part: "I have always tried to work for peace and better understanding in this troubled world.
"[citation needed] For his defection, Radványi was convicted and sentenced to death in absentia by a Hungarian court.
Shortly thereafter, he joined the faculty of the History Department at Mississippi State University.