Abstract: A Christmas light string holder for use on interior and exterior surfaces of buildings. The holder comprises a flexible, resilient, helical wire, a fastener such as a nail or screw and, optionally, a convex cap with a hollow recess for dressing the head of the nail. To mount a light string on a surface, a holder is attached at each of several spaced apart locations on the surface, and the light string is wedged between, and retained by, adjacent turns of the helical wires. The light string is easily disattached from the holders by spreading apart the adjacent turns long enough to lift away the light string. The holders can remain in place year-round if desired, and can be used for mounting other objects to the same surface.