A universal trailer-hitch mirror system has an attachment configuration (1, 20) with a system fastener that includes a suction cup (2), a tailgate hook (3) and a base (4) for fastening the attachment configuration universally to a support object that is accessible for support of a system mirror (7) for mirror viewing of tow components (18) of a tow vehicle and trailer components (19) of a trailerable vehicle with the tow vehicle being within hitching-steerable proximity to the trailerable vehicle. The system mirror can be positioned for viewing from either a rearview mirror (14) or a side-view mirror (22). A mirror holder (5, 21) is attached orientationally to the attachment configuration with an orientation controller (6). The system mirror is attached orientationally to the mirror holder with a system-mirror joint (8). The attachment configuration is articulated to be positioned in desired proximity to rear components of the tow vehicle, to front components of the trailerable vehicle and to objects which include ground surface (23) proximate thereto selectively. The system fastener is articulated predeterminedly to attach the attachment configuration to the support object selectively.