Abstract: A closet partition system includes a simplified arrangement that reduces the number of steps required for installation and eliminates difficult manipulations, whereby an individual may easily install a closet partition system without requiring assistance. The mounting rail and bracket provide stable support that prevents the possibility of accidental dislodgement of the bracket from the mounting rail. The mounting rail includes a vertical back for attachment to a wall, a horizontal ledge projecting from the back, and a hook having a first section extending horizontally from the back and a second section extending downwardly toward the ledge. The bracket includes an elongate notch extending downwardly from an upper edge of the bracket for receiving the second section of the hook. This arrangement provides a closet partition system that is easy to use, capable of providing very high load bearing capability, and facilitates repeated disassembly and reassembly without degradation of the components.