Đặng Tuyết Mai, also known as Madame Nguyễn Cao Kỳ (4 October 1941 – 21 December 2016) was the former wife of Nguyễn Cao Kỳ, former Republic of Vietnam Air Force commander and politician, who served as Prime Minister of South Vietnam from 1965 to 1967, and then as vice president until his retirement from politics in 1971.