USS Ashtabula (AO-51) was a Cimarron-class fleet oiler of the United States Navy in service from 1943 to 1991. She survived three wars and was awarded eight battle stars for World War II service, four battle stars for Korean War service, and eight campaign stars for Vietnam War service. In the mid-1960s Ashtabula became the lead ship of her class, when she and seven other Cimarron-class oilers were lengthened ("jumbozied"). She has been the only U.S. Navy ship to bear the name Ashtabula, after the Ashtabula River in northeast Ohio.