Phạm Tuân (born February 14, 1947) is a retired Vietnam Air Force aviator. He became the first Vietnamese citizen and the first Asian in space when he flew aboard the Soyuz 37 mission as an Intercosmos Research Cosmonaut.
Tuân reached the rank of lieutenant colonel in the VPAF before eventually training to be a research cosmonaut in the joint USSR-Vietnamese Space program. On April 1, 1979, he was selected as a member of the sixth international crew for the Intercosmos program. His backup was Bùi Thanh Liêm. Tuân, along with Soviet cosmonaut Viktor Gorbatko, was launched from Baikonur Cosmodrome on July 23, 1980, on board the Soyuz 37 mission to the Salyut 6 space station.