A cable hanger for mounting cables to a mounting structure includes: a base panel; a pair of arms attached to opposite ends of the base panel; and a pair of locking projections, each locking projection being attached adjacent a free end of a respective arm. Each arm is configured to define a respective internal cavity configured to grasp cable. The arms and the base panel combine to define an external cavity for grasping cable. The cable hanger can be deflected from a relaxed state to a deflected state by forcing the locking projections toward each other. In the deflected state the cable hanger may be mounted to a mounting structure, with the arms inserted through a hole in the mounting structure and exerting outward pressure on edges of the hole, and the locking projections maintaining the cable hanger in a mounted position on the mounting structure.