Claus Bo Larsen (born 28 October 1965 in Odense) is a former Danish football referee who officiates in the Danish Superliga and was FIFA-listed from 1996 to 2010.
He has officiated numerous matches in the UEFA Cup and Champions League.
Larsen is classified as a FIFA Top Class Referee, which is the highest level of referees.
He is well known for his down-to-earth appearance on the field, preferring to control the game with a good personality rather than cautioning the players.