Several Canadian naval units have been named HMCS St. Laurent.
HMCS St. Laurent (H83) (I) initially served the Royal Navy as the Interwar Standard C-class destroyer HMS Cygnet (H83) before transfer to the Royal Canadian Navy for service as a River-class destroyer in the Second World WarHMCS St. Laurent (DDH 205) (II) was the lead ship of the Cold war St. Laurent-class destroyers