Three ships of the Royal Norwegian Navy have borne the name HNoMS Vidar, after Víðarr – Norse god of vengeance and son of Odin and the giantess Gríðr:
was a paddlesteam schooner was a Rendel gunboat built for the Royal Norwegian Navy at Karljohansvern Naval Yard in 1878 was a minelayer built in 1977, and sold to the Lithuanian Navy in 2006