Mạc Thái Tông (莫太宗, 1500 – 25 January 1540), known also by his given name Mạc Đăng Doanh (莫登瀛), was the second emperor of the Mac Dynasty of Vietnam from 1530 to 1540. His father Mạc Thái Tổ was still alive during the first year of his reign and also reigning as “senior emperor” (Thái thượng hoàng). His posthumous name is Văn hoàng đế (文皇帝) and his era name is Đại Chính.