USS O-12 (SS-73) was an O-class submarine of the United States Navy. These later O-boats, O-11 through O-16, were designed by Lake Torpedo Boat to different specifications than the earlier Electric Boat designs. They performed poorly as compared to the Electric Boat units, and are sometimes considered a separate class. The ship was launched in 1917 and entered service with the Navy in 1918 in the Panama Canal Zone.

John Wilson Danenhower was a United States Navy officer best known for his participation in the Jeannette expedition.