A facial-interface system for a head-mounted-display device may include a facial interface and a facial-interface adjustment apparatus. The facial-interface adjustment apparatus may include (1) an interface-mounting member for mounting the facial-interface adjustment apparatus to a display housing, and (2) a pivot member coupled to the facial interface and rotatably coupled to the interface-mounting member such that that the facial interface is rotatable between a plurality of positions relative to the interface-mounting member. A head-mounted-display device may include a facial interface, a display housing, and a facial-interface adjustment apparatus. The facial-interface adjustment apparatus may include (1) an interface-mounting member disposed in an interior of the display housing, and (2) a pivot member coupled to the facial interface and rotatably coupled to the interface-mounting member such that that the facial interface is rotatable between a plurality of positions relative to the display housing. Various other apparatuses, systems, and methods are also disclosed.