A cantilevered hitch dolly is used with and in combination with a vehicle trailer hitch extending from the vehicle to support a storage container thereon. The dolly includes a platform having a hitch receiver member. A connector removably connects the hitch receiver member to an exposed end of the trailer hitch to provide cantilever support of the platform above ground level, so that when the platform is connected to the trailer hitch, the vehicle may be moved with the dolly firmly joined to the vehicle and free of any contact with the ground level. A plurality of swiveled legs are mounted on opposite sides of the platform, and are lowered when the vehicle is in place and the dolly is being removed from attachment to the vehicle. Wheels are mounted on bottom ends of the swiveled legs to allow the dolly to be readily moved about after detachment from the vehicle and being wheeled back into position for attaching the hitch receiver member to the trailer hitch.