Celsius is a temperature scale.
Celsius may also refer to:
- Celsius (character), a DC Comics superhero
- Celsius (crater), a lunar crater
- 4169 Celsius, an asteroid
- Celsius Mission, the flight of Swedish ESA astronaut Christer Fuglesang to the International Space Station
- Celsius, an airship in Final Fantasy X-2
- Celsius, a spirit in Tales of Symphonia and other Tales games
- Fujitsu Celsius, a line of workstation computers made by Fujitsu
- Celsius Network, a bankrupt cryptocurrency company and wallet
- Celsius Holdings, an energy drink company founded in 2004.
