Marcia Gudereit (born September 8, 1965 as Marcia Schiml) is a Canadian curler.
Born in Moose Jaw, Saskatchewan, she was part of Team Schmirler, the women's curling team that won a gold medal at the 1998 Winter Olympics. This team is the only 3-time winner of the World Curling Championship (1993, 1994, 1997). After Sandra died, she remained in the team, now skipped by Jan Betker for whom she currently plays. She curls out of the Caledonia Curling Club in Regina, Saskatchewan and works as a systems analyst for The Co-operators.
In 2000, she was inducted into Canada's Sports Hall of Fame.
Not many people know that Marcia is ambidextrous. She writes with her left hand but curls with her right hand.