USS Saugatuck (AO-75) was a Suamico-class replenishment oiler of the United States Navy. The ship was laid down on 20 August 1942 as SS Newtown, a Maritime Commission type Type T2-SE-A1 tanker hull, under Maritime Commission contract (MC hull 355) at the Sun Shipbuilding & Drydock Co., Chester, Pennsylvania. She was renamed Saugatuck on 16 September 1942. Launched on 7 December 1942, and delivered to the U.S. Navy, she was converted for naval service at Bethlehem Steel Co., Key Highway Plant, Baltimore, Maryland. She was commissioned on 19 February 1943, with Lt. Comdr. Ben Koerner, USNR, in command. It was named for the Saugatuck River in Connecticut.