Margaret Elizabeth Flaherty (born June 2, 2000) is an American professional ice hockey defenseman for the Montreal Victoire of the Professional Women's Hockey League (PWHL). She previously played for the Minnesota Frost of the PWHL. She played college ice hockey at Minnesota Duluth.
Flaherty was drafted in the fourth round, 24th overall by the PWHL Montreal. .In two seasons with the Minnesota Frost she recorded two goals and six assists in 46 games, and won consecutive Walter Cups. On June 20, 2025, Flaherty signed a one-year contract with the Montreal Victoire.
Flaherty was a member of the gold medal-winning United States women's national under-18 ice hockey team at the IIHF World Women's U18 Championship in 2018.
Flaherty was born in Edina, Minnesota and grew up in Lakeville, Minnesota. She attended the University of Minnesota Duluth and earned a bachelor's degree in communications.