USS N-6 (SS-58) was a N-class coastal defense submarine of the United States Navy. Her keel was laid down on 15 April 1915 by Lake Torpedo Boat Company in Bridgeport, Connecticut. The N-boats built by Lake had slightly different specifications from the ones built by Seattle Construction and Drydock and are sometimes considered a separate class. N-6 was launched on 21 April 1917 sponsored by Mrs. John A. Kissick, and commissioned on 9 July 1918 with Lieutenant Commander Herbert R. Hein in command.