USS Pasig (AO-89) was a fleet replenishment oiler in the service of the United States Navy. The lone ship in her class, she was the first of only two U.S. Naval vessels to be named for the Pasig River which flows through Manila on the Philippine Island of Luzon.
Pasig was intended for use as a storage tank in the South Pacific near New Caledonia, but was replaced by concrete barges. She decommissioned and was delivered to WSA on 25 September 1943, and was struck from the Naval Vessel Register on 11 October 1943.
Returned to her owner, Pasig reverted to her original name and served as SS J.C. Donnell until scrapped in 1947.