REM or Rem may refer to:

• R.E.M., an American rock band
• R.E.M. (EP), an EP by Green
• Rém, a village in Hungary
• REM sleep, a normal stage of sleep characterized by rapid movements of the eyes
• REM Island, home of 1964 pirate stations Radio and TV Noordzee
• Rem (unit) or Röntgen equivalent man, a unit of radiation dose
• Rem (mythology), a fish god
• Reichserziehungsministerium or REM
• Rosicrucian Egyptian Museum or REM, a museum about ancient Egypt
• REM, a keyword for an inline comment in some computer languages
• rem, a Modulo operator in some computer languages
• Rem, a Shinigami character in Death Note
• Rem, a character in the anime series Trigun

See also

• Rem Koolhaas, a Dutch architect