USS Peconic (AOG-68), was a type T1 Klickitat-class gasoline tanker built for the US Navy during World War II.

Peconic was laid down on 31 January 1945, under a Maritime Commission (MARCOM) contract, MC hull 2628, by the St. Johns River Shipbuilding Company, Jacksonville, Florida; sponsored by Mrs. Mal Haughton, Jr.; acquired on a loan basis by the Navy 28 September 1945; and commissioned 29 September 1945.

[1][2][4] Peconic reported to Commander Service Force Atlantic at Norfolk, Virginia, 27 November.

NTS became Military Sea Transportation Service (MSTS) 1 October 1949, and the ship was then designated USNS Peconic (AOG-68).

[4] Peconic was reinstated to the Naval Vessel Register 28 April 1950, and she continued service in MSTS until 12 November 1957, when she transferred to the Maritime Administration (MARAD) National Defense Reserve Fleet at Beaumont, Texas.