The Red Emperor or Red Deity (赤帝 Chìdì) was a legendary ancient Chinese ruler in pre-dynastic times.

Red Emperor or red emperor may also refer to: Emperor (grape), a red grape variety also known as Red Emperor Lutjanus sebae, a species of fish, also known as red emperor Mao Zedong (1893–1976), Chairman of the Chinese Communist Party, sometimes called the Red Emperor Lal Baadshah (), a 1999 Indian Hindi-language film "Red Emperor", a cultivar of the tulip Tulipa fosteriana

See also Red King (disambiguation) Red Empire (disambiguation)