Red (disambiguation)
Red could refer to:

 Red, the color
 Red (slang), a pejorative for a Communist
 Reds, an alternate timeline faction
 Red alert, a type of alert
 Red Alert Chili, a chili recipe named after this alert
 Red Angel, a mysterious figure
 Red blood cell, a type of blood cell
 Red carpet, a carpet
 Red dwarf, a type of star
 Red dye number two, a type of dye 
 Red giant, a type of star
 Red Giant 23139, a specific red giant 
 Red supergiant, a type of star
 Red-Headed League, an organization
 Red herring, a literary device
 Red hour, a time on Beta III
 Red leaf tea, a type of tea
 Red line, a type of warning
 Red match, a type of Tsunkatse match
 Red matter, a type of matter
 Red ochre, a type of paint
 Redspice, a type of spice
 Red Squad, a type of squad
 Red 2 message, a type of priority message
 Level Red, a level aboard Hospital Ship 4-2

Real world
 , an episode of Star Trek: Discovery's second season.