Marvin Marsh
| Gender | Male |
| Age | 102 |
| Hair Color | grey/Black |
| Occupation | Retired Steel Mill Worker Retired Army Air Force |
| Aliases | Grandpa Marsh |
| Religion | Roman Catholic |
| Ex-Wife | Grandma Marsh |
| Son | Randy Marsh |
| Grandson | Stan Marsh |
| Granddaughtter | Shelly Marsh |
| Daughter In-Law | Sharon Marsh |
| Voiced by | Trey Parker |
About
This is Stan's grandfather (full name: Marvin Marsh).
He's old, dying and is constantly trying to kill himself. He helped lead the AARP in their charge to not take old people's licenses away. He is also an elite member of the Hare Club For Men, a fact we learned in The Fantastic Easter Special.
Family
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Randy Marsh
Randy Marsh
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Sharon Marsh
Sharon Marsh