Marianne Dahlmo (born January 5, 1965) is a former Norwegian cross country skier who competed from 1985 to 1994. She won a silver medal in the 4 x 5 km at the 1988 Winter Olympics in Calgary and also finished 8th in the 20 km event in those same games.
Dahlmo also won two medals in the 4 x 5 km FIS Nordic World Ski Championships (silver: 1987, bronze: 1989). She also finished 5th in the 10 km in 1987 and 5th again in the 5 km in 1991. She also won 4 World Cup Events during the late 1980s as well.