- For other characters with the same name, see Jimmy.
- "Why do I have to hold your hand through this whole mid-life crisis bullshit?"
Jimmy is the son of Michael, one of the game's main protagonists, and Amanda and the older brother of Tracey. According to GameInformer, Jimmy is a 20 year old whiny and lazy pot smoker who has a very confused relationship with his father.
Dan Houser has described Jimmy as a 20 year old, whiny, pot smoker with the actor capturing the story of him briliantly, but he is also prominently very lazy, and addicted to video games, as he is seen on a console in his bedroom during Michael's character trailer.
Jimmy seems to be bold enough to stand up to his father, Michael De Santa, but when Michael comes back at him with aggression, Jimmy backs down.
Jimmy is a redhead, overweight man of medium size and height. He has a tattoo with his name on his neck. He wears a red and black jersey, with "07" on the back and a white undershirt, a pair of grayish blue jeans with red, black and white sneakers and a silver necklace to match. Because of the way he acts and dresses, he appears to be mimicking the appearance and personality of a gangster, possibly poking fun at the movie Malibu's Most Wanted. He has many tattoos, one of them reads "Edifica adversario tuo aureum pons ad receptum trans.", which translates to "Build your opponent a golden bridge to retreat across."