Mona Marshall (born August 31, 1947) is an American voice actress. She is most well known for voicing many of the female characters (e.g. Sheila Broflovski, Linda Stotch, etc.) on Comedy Central's landmark animated series South Park, replacing the late Mary Kay Bergman after she died after the show's first three years.

Her Disney roles have included Aquata in The Little Mermaid series, the additional voices in Wreck-It Ralph, Kinect Disneyland Adventures, Tangled, The Princess and the Frog, Get A Horse!, Frozen, the English dubs of Studio Ghibli films (such as Ponyo, The Cat Returns, and Spirited Away) The Wild, Chicken Little, Monsters, Inc., Inside Out, The Hunchback of Notre Dame, Emmet in Monsters University, Matilda in Dumbo's Circus, and Bird Brain Mary in Treasure Planet.