Abstract: The present invention discloses a modular shelf mounting system 10 having a bracket member 20 for mounting and supporting a shelf member 12. The bracket member 20 has multiple holes 22 therein for having its rear side mounted to a wall 14 at the stud locations. Furthermore, the bracket 20 has forwardly projecting multiple cantilevered male members 18 which cantilevered members are inserted into mating female apertures 16 located in the shelf 12 whereby the shelf 12 can be slidably attached onto the cantilevered members 18. Alternative embodiments are shown for placement of the shelf in a corner and having the cantilevered members hinged 26 at their base. An additional embodiment is shown wherein the shelf is mounted onto the bracket 36 using multiple attachment means 42 thereby avoiding the need of the cantilevered forwardly projecting members 18.