Abstract: The illuminated graded card slab holder may include a slab and an illumination subsystem. The slab may hold and encapsulate a graded card. The slab may protect the graded card from damage. The slab may comprise two display windows to provide visibility to the graded card and a frame surrounding the two display windows to strengthen the slab. The illumination subsystem may provide illumination of at least one side of the graded card that is encapsulated within the slab. As non-limiting examples, the graded card may be a trading card such as a sports card depicting a baseball or football player, a collectible card depicting a movie or video game character, or a game card which may be used as a game piece in a fantasy or role-playing game.