Nodens or Nodons was a Celtic deity worshipped in Britain. He had a shrine in Gloucester on the river Severn. In Roman times he was equated with Mars, probably as a healer rather than a warrior, and Silvanus, the god of hunting.

The Irish deity Nuada and the Welsh Nudd are derived from Nodens.

Nodens is also a fictional deity in H.P. Lovecraft's Cthulhu Mythos.