Abstract: There is disclosed a sign post anchor system that provides omni-directional stabilization of a sign post. The inventive anchor system includes a tubular anchor sleeve having a square cross-section for receiving at one end the sign post and at the other end the tubular post anchor. The anchor sleeve includes a plurality of spaced apart holes located along the longitudinal axis of the sleeve for permitting selective mounting of the sign post. The anchor sleeve further includes a plurality of fins secured to the corners of the anchor sleeve and extending outward from the sleeve. The plurality of fins provide stabilization of the anchor sleeve and accompanying sign post.