Abstract: A ladder rack sign system to be secured to a vehicle or a ladder rack mounted to the vehicle to hide the ladder rack/ladders and to display signs that can be utilized as advertising. The system includes upper and lower tracks to secure one or more signs therewithin, a back plate to support the upper and lower tracks and to space them a certain distance apart, end plates to secure the one or more signs therewithin, and mounting brackets to secure the system to the ladder rack and/or vehicle. The system may be installed on any type of vehicle, any type of ladder racks, roof racks, cargo racks, bike racks or the like. The system, using different mounting brackets or no mounting brackets at all, may be attached to any solid surface (e.g., wall, frame, structure). The system provides easy changing of signs to utilize different advertizing opportunities.