Kristoffer Brun (born 7 April 1988) is a Norwegian rower.
He competed at the 2012 Summer Olympics in London in the men's lightweight double sculls with teammate Are Strandli.
They teamed again to win the bronze medal in that event at the 2016 Olympics.The team are also world champions in their event, at the 2013 World Championships in Chungjiu.
They have also won world championships bronze twice.
At European level, the team of Brun and Strandli have won one silver and three bronzes.