An outlet cover with barrier wall, the cover for an outlet box mounted in a building wall including an outer wall with an outer opening formed in the outer wall; a surrounding wall integrally joined to an outer periphery of the outer wall and extending substantially normal to the outer wall; a barrier wall integrally joined to an inner periphery of the outer wall at an edge of the outer opening and extending substantially normal to the outer wall, the barrier wall forming an inner opening opposite the outer opening to meet the outlet box; and an attaching flange integrally joined to an inner end of the surrounding wall for being placed against the building wall, the attaching flange being a continuous flange about an exterior periphery of the surrounding wall.