Stanley Randall William "Stan" Marsh is the overall main protagonist and one of the four main characters from the animated television series South Park. He is voiced by and loosely based on series co-creator Trey Parker. Stan Marsh is one of the show's four central characters, along with Eric Cartman, Kyle Broflovski, and Kenny McCormick. 

Stan Marsh is an elementary school student who commonly has extraordinary experiences not typical of conventional small-town life in his fictional hometown of South Park, Colorado. Stan Marsh is generally depicted as kind-hearted, intelligent, trustworthy and patient (if somewhat arrogant). He is outspoken in expressing his distinct lack of esteem for adults and their influences, as adult South Park residents rarely make use of their critical faculties.