Stanley Randall "Stan" Marsh is a fictional character in the animated television series "South Park". He is voiced by the series co-creator Trey Parker. He is also one of the four main characters in the series with Eric Cartman, Kenny McCormick, and Kyle Broflovski. Stan is usually known as the serious and sensitive person of the group. Stan is able to think clearly and is good-natured. Stan usually tries to come up with logical solutions to their outrageous situations.