Taizong (太宗 lit. means grand clan forefather in Chinese) can be the name of the following Chinese emperors (or non-Chinese emperors of dynasties that later ruled over China):

• Emperor Taizong of Tang China (reign: 626–649)
• Emperor Taizong of Song China (reign: 976–997)
• Ögedei Khan of the Mongol Yuan Dynasty (reign: 1229-1241)
• Hong Taiji of the Manchu Qing Dynasty (reign: 1626-1643)