In Celtic mythology, Taranis (Proto-Celtic: *Toranos, earlier *Tonaros; Latin: Taranus, earlier Tanarus) is the god of thunder, who was worshipped primarily in Gaul, Hispania, Britain, and Ireland, but also in the Rhineland and Danube regions, amongst others. Taranis, along with Esus and Toutatis, was mentioned by the Roman poet Lucan in his epic poem Pharsalia as a Celtic deity to whom human sacrificial offerings were made. Taranis was associated, as was the Cyclops Brontes ("thunder") in Greek mythology, with the wheel.

Many representations of a bearded god with a thunderbolt in one hand and a wheel in the other have been recovered from Gaul, where this deity apparently came to be syncretised with Jupiter.