Pollux may refer to:
- Astronomy
- Pollux (star), (β Geminorum)
- Pollux, a crater on the Saturnian moon Epimetheus
- Building
- Kastor und Pollux, a complex of two towers in Frankfurt am Main, Germany
- Fictional characters
- Pollux Black, a pureblood wizard, grandfather of Sirius Black in the Harry Potter universe
- Games
- Pollux, a monster in the online game Granado Espada
- Pollux, a character in the erotic anime series Words Worth
- Pollux (arcade game), an arcade game manufactured by Dooyong in 1991
- Pollux Gamelabs, a Danish game development company.
- The Pollux Engine, a game engine developed by Square-Enix for easy porting between the Wii and Nintendo DS systems, used in both versions of Final Fantasy Crystal Chronicles: Echoes of Time
- Geography
- Pollux (mountain), a mountain in the Pennine Alps, in Italy and Switzerland
- Mythology
- Pollux or Polydeuces, one of the Dioscuri; see Castor and Pollux
- People
- Julius Pollux, also known as Ioulios Poludeukes (2nd century A.D), a Greek rhetorician
- Railroads
- Pollux, a South Devon Railway 4-4-0ST steam locomotive of the South Devon Railway Eagle class
- Ships
- SS Southern Cross (1886), a whaler and exploration ship originally named SS Pollux
- SS Pollux, the name of more than one ship
- USNS Pollux (T-AKR-290), ex-T-AK-290, a vehicle cargo ship in non-commissioned Military Sealift Command service as USNS Pollux (T-AKR-290) from 1981 to 2007, since 2007 maintained by the United States Maritime Administration as part of the Ready Reserve Force
- USS Pollux, the name of more than one United States Navy ship
- MS Abel Tasman was known as Pollux in 1994-1995.
- Television
- EAS Pollux, a spaceship in the television series Babylon 5
- Pollux, a dog in the French television series Le Manège Enchanté, known as Dougal in the English version, The Magic Roundabout