The Seattle SuperSonics ( also called the Seattle Sonics ) were an American professional basketball team based in Seattle , Washington that played in the Pacific and Northwest Divisions of the National Basketball Association ( NBA ) from 1967 until its final season in 2007 â `` 2008 . The Seattle SuperSonics ( also commonly referred to as the Sonics ) were an American professional basketball team based in Seattle , Washington that played in the Pacific and Northwest Divisions of the National Basketball Association ( NBA ) from 1967 until 2008 .