Emperor Cảnh Thịnh (chữ Hán: 景盛), born Nguyễn Quang Toản (chữ Hán: 阮光纘; 1783–1802), was the third and last emperor of the Tây Sơn dynasty. He followed his father Quang Trung (Nguyễn Huệ ruled 1788–1792) at the age of 9, and reigned for 10 years.
Cảnh Thịnh was defeated by the Nguyễn dynasty in 1802. He was taken, along with a number of his royalties, officials, and generals, to Phú Xuân. There, he was executed by Gia Long, first emperor of the Nguyễn dynasty.