A locking electrical plug is disclosed having a rigid tubular housing which rotates axially around a partially enclosed cylindrical socket face. As the tubular housing rotates, internally projecting cam engages clevis pins on the socket face, which pins lock through apertures of male electrical prongs detachably inserted into jacks on the socket face. The clevis pins are disengaged from the electrical prongs as the tubular body is rotated backward, the clevis pins biased back into an open position by resilient springs. Certain embodiments of the present invention recite electrical outlet embodiments comprising a plurality of socket faces. The locking electrical socket securely retains the male end of a US 120 volt electrical plug, but may be embodied to retain the male end of a US 220 volt electrical plug or electrical plugs of various international standards.