Nguyễn Văn Huyền was a Vietnamese lawyer and politician, who served as the last Vice President of South Vietnam in 1975. He took the position of Vice President at President Dương Văn Minh's request, who was trying to hold peace talks, but held the position for only two days before the fall of South Vietnam on 30 April 1975. He also served as the first President of the Senate of South Vietnam from December 1967 to January 1973. In the last years of his life, he was invited to join the Vietnam Fatherland Front of the unified Socialist Republic of Vietnam as an independent and was elected as a member of its Central Committee's Presidium, where he died in office in 1995.

The National Assembly of the Republic of Vietnam was the national legislature of the Republic of Vietnam.