Marcie Johnson is a bespectacled fictional character featured in Charles M. Schulz's comic strip Peanuts. She serves as comedic foil and best friend to tomboy Peppermint Patty, plays a supporting role in some of Snoopy's heroic fantasies, and displays a romantic interest in Charlie Brown, who seems to love her back.
In "Stuck Together, Torn Apart", it is revealed she lives in Quahog, Rhode Island with her lesbian domestic partner, Patty. Patty credits Marcie for her graceful aging. She was voiced by Meredith Scott Lynn.