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Michael Sullivan (U.S. attorney) (born 1954), former Boston-based federal prosecutor and acting ATF Director •
Michael Sullivan (Canadian senator) (1838–1915), Canadian senator •
Michael Sullivan (MP) (1809–1878), UK MP for the Irish constituency of Kilkenny, 1847–1865 •
Michael D. Sullivan (judge) (1938–2000), justice of the Supreme Court of Mississippi •
Michael J. Sullivan (mayor) (born 1956), mayor of Lawrence, Massachusetts •
Michael J. Sullivan (Wyoming politician) (born 1943), Wyoming labor commissioner •
Michael A. Sullivan (politician) (born 1959), former mayor of Cambridge, Massachusetts •
Michael A. Sullivan (judge) (1879–1937), chief justice of the Massachusetts Land Court •
Michael T. Sullivan (1924–2007), American lawyer and judge in Wisconsin •
Michael Quinn Sullivan (born 1970), president of Empower Texans and Texans for Fiscal Responsibility •
Michael S. Sullivan (1876–1929), Newfoundland, Canada, politician •
Mike Sullivan (Wyoming politician) (born 1939), governor of Wyoming and former U.S. ambassador to Ireland •
Mike Sullivan (Canadian politician) (born 1952), Canadian member of parliament ==Sportsmen==