Abstract: The support dolly for hitch-mounted accessories includes a center plate, a plurality of outrigger tubes, a plurality of wheel assemblies, a right angle adapter, and a plurality of lock pins. The support dolly for hitch-mounted accessories may be operable as a stationary stand for storing a hitch-mounted accessory when the plurality of wheel assemblies are not deployed or as a dolly for moving the hitch-mounted accessory when the plurality of wheel assemblies are deployed. As non-limiting examples, the hitch-mounted accessory may be an accessory that couples to a trailer hitch receiver tube of a tow vehicle such as a bike rack, a winch, a generator, a cargo basket, or a dirt bike carrier. The support dolly for hitch-mounted accessories may be reconfigurable to alter the footprint of the support dolly for hitch-mounted accessories or to couple multiples of the center plates together.