A collapsible mobile stage may be folded into a configuration and the shape of a trailer that may be hauled by a truck. The collapsible mobile stage includes an elevated framework supported by telescoping columns. The elevated framework may be used to support lighting, audio and visual systems. The mobile stage also provides seating for an audience on either side of a central stage supported by a platform. The platform includes a central segment between two opposing lateral segments. The lateral segments may be folded up to form the sides of a trailer while the central segment forms the bottom of the trailer. Audience seating sections may be folded over the platform segments to create the roof of the trailer. Audience seating as well as the elevated framework may be stored within the trailer or within a secondary trailer.