Who is Stan Marsh's father in South Park?

Stan Marsh’s father in South Park is Randy Marsh.

Randy is one of the series’ most prominent adult characters. He is married to Sharon Marsh and is the father of Stan and Shelley Marsh. The family lives in the fictional Colorado town of South Park, where Randy’s behavior often becomes as chaotic and exaggerated as the children’s adventures.

Randy was originally characterized as a geologist, a detail that reflects Trey Parker’s father, who also worked as a geologist. Over time, the character became increasingly central to the show’s stories. His scientific background remains part of his identity, but he is also depicted pursuing bizarre schemes, adopting temporary obsessions, and making impulsive decisions that embarrass Stan.

A major later storyline involves Randy’s marijuana business, Tegridy Farms. Beginning in the show’s twenty-second season, the Marsh family moves to the farm as Randy attempts to build a cannabis brand. This shift gives Randy even more plot prominence and frequently strains his relationship with Stan.

The other listed names belong to different South Park families or relationships. Jimbo Kern is Randy’s brother-in-law and Stan’s uncle, Stephen Stotch is Butters’s father, and Gerald Broflovski is Kyle’s father.