Nguyễn Lưu Viên (Vietnamese pronunciation: [ŋwiən˦ˀ˥ liw˧˧ viən˧˧]; 21 November 1919[1] – 18 September 2017) was a South Vietnamese doctor and politician who served as Deputy Prime Minister of South Vietnam under various prime ministers.

He was born on 21 November 1919 to a wealthy family in Trà Vinh province.

In 1945, while he was studying medicine at the Hanoi Medical University to obtain his M.D., he joined the Viet Minh in their resistance to the French.

[3][4] Under the regime of President Ngô Đình Diệm, in 1954, he held the position of Head of the General Commission for Refugees, which he helped with the influx of refugees from the North after Vietnam was partitioned into two separate countries.

[8] After arriving in Guam, Viên was then relocated to Camp Pendleton along with other Vietnamese refugees.