Abstract: Stucco support structures and stucco wall systems incorporating the stucco support structures are provided. The stucco support structure includes a structural layer of composite material. The composite material includes a homogenous matrix of a gypsum material and a polymer resin material, and wet-use chopped strand fibers that are filamentized within the homogenous matrix. The stucco support structure also includes a stucco adhesion member interfaced with the structural layer that is configured to receive and bond a stucco material to the structural layer. The stucco support structure eliminates the need for sheathing and wire mesh lath conventionally used in stucco applications.