William J. Campbell
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William J. Campbell may refer to:William James Campbell (1850–1896), state senator and Lieutenant Governor of Illinois
William Joseph Campbell (1905–1988), U.S. federal judge from Illinois
Bill Campbell, Republican politician from California
William John Campbell, mayor of Freetown, Sierra Leone
William J. Campbell (general) (1931–2017), American Air Force general
William Joseph Campbell (meteorologist) (1930–1992), American meteorologist