USS Brazos (AO-4) was an Kanawha-class fleet oiler built during World War I for service in the United States Navy, and named for the Brazos River, the longest river in the State of Texas. Brazos was laid down at the Boston Navy Yard; launched 1 May 1919; sponsored by Miss Catherine Rush; and commissioned 1 October 1919, Commander R. Werner, USNRF in command.