C31
# C31

C31 or C-31 may refer to:

## Vehicles

* Fokker C-31A Troopship, a Dutch military transport
* HMS C31, a C-class submarine of the Royal Navy
* Nissan Laurel C31, a Japanese sedan
* Sauber C31, a Swiss Formula One car

## Other uses

* Blackstripe corydoras, a tropical freshwater fish
* C-31 highway (Spain), in Catalonia
* C31 road (Namibia)
* Bill C-31, various legislation of the Parliament of Canada
* Caldwell 31, an emission/reflection nebula
* Channel 31 (disambiguation)
* King's Gambit, Falkbeer Countergambit, a chess opening
* C31, a London Cycleway
