Red sun or Red Sun may refer to:

Astronomy

• Red giant star
• Red dwarf star
• Any star with a suitable spectral type

Titled works

• Red Sun, a 1971 film
• Red Sun (1970 film), a West German crime film
• "Red Sun", a track from Anoushka Shankar's 2005 album Rise
• "Red Sun" (紅日), a 1992 Cantopop song by Hacken Lee later released on collections with the same title
• "Red Sun", song from the original soundtrack of Metal Gear Rising: Revengeance

Other uses

• A nickname of the founder of People's Republic of China, Mao Zedong
• Rao (comics), the sun of Krypton, Superman's native world
• Red Sun, one of two versions of the video game Mega Man Battle Network 4
• Communist Party of Ecuador – Red Sun, a small Marxist–Leninist–Maoist guerrilla organization in Ecuador
• Red Sun - People's Movement, a Marxist-Leninist-Maoist political organization in Mexico
• Red sunflower, a sunflower variety

See also

• Superman: Red Son, a comic book limited series
• Superman: Red Son (film), an animated film based on the comics