Ole Gunnar Fidjestøl (born March 21, 1960 in Kristiansand) is a Norwegian ski jumper who competed from 1983 to 1992 representing Vikersund IF. He won silver medals in the team large hill event at the FIS Nordic World Ski Championships (1987, 1989) as well as a bronze medal in the team large hill at the 1988 Winter Olympics.
Fidjestøl won the FIS Ski-Flying World Championships 1988 in Oberstdorf and earned four additional career victories from 1985 to 1989. He won also four individual titles and one team title at the national level.
He has later been involved administratively in Vikersund IF and the football club Modum FK.