Ponaganset (also, Ponnaganset, Ponagansett or Ponnagansett), a Native American-derived name, may refer to: Ponaganset High School, North Scituate, Rhode Island, U.S. Ponaganset Reservoir, a lake in Rhode Island, U.S. Ponaganset River, Rhode Island, U.S. USS Ponaganset (AO-86, US Navy)