Nguy?n Tôn Hoàn (May 1917 – 19 September 2001) was Vietnamese Catholic politician, originally a physician, who led the Ð?i Vi?t Qu?c Dân Ð?ng (Nationalist Party of Greater Vietnam) from the 1940s to the 1960s.
He was active in South Vietnamese politics during that time, serving briefly as Deputy Prime Minister in 1964.