Abstract: A double self-latching double-locking gate latch mechanism includes a first latch bracket for attachment to one gate member and supporting a rotatable latch element for movement between latched and unlatched positions and having a locking plate member at one end for registry with a locking element of the bracket each forming a lock opening to receive a padlock at the latched position of the rotatable latch element. At its opposite end the rotatable latch element defines a transversely oriented elongate head. A second latch bracket is provided for attachment to a second gate member and forms a latch chamber that receives an elongate latch slide having a bifurcated extremity forming an elongate slot of sufficient width for passage of the T-head therethrough when the rotatable latch element is at its unlatched position with the elongate head of the rotatable latch element oriented transversely of the elongate slot.