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Joseph Johnson (South Carolina mayor) (1776–1862), mayor of Charleston, South Carolina, United States •
Joseph Johnson (Virginia politician) (1785–1877), U.S. Representative and Governor of Virginia •
Frank Johnson (politician) (Joseph Colin Francis Johnson, 1848–1904), journalist and politician in South Australia, Minister of Education 1887 to 1889 •
Joseph Johnson (FDNY Commissioner) (1871–1941), American fire department commissioner •
Joseph B. Johnson (1893–1986), Governor of Vermont •
Joseph B. Johnson (Wisconsin politician) (1837–1913), American farmer-politician from Wisconsin •
Joseph E. Johnson (government official) (1906–1990), American government official with the United States Department of State and the United Nations •
Joseph P. Johnson (1931-2022), Virginia state delegate •
Joseph T. Johnson (1858–1919), U.S. Representative from South Carolina and U.S. federal judge •
J. M. Johnson (Joseph Modupe Johnson, 1911–1987), Nigerian politician •
Joseph L. Johnson (1874–1945), United States Ambassador to Liberia •
Joseph A. Johnson (1917–2007), American politician in the Virginia House of Delegates •
Jo Johnson (Joseph Edmund Johnson, born 1971), British Conservative politician, former MP for Orpington and life peer in the House of Lords •
Joseph F. Johnson, Liberian politician ==Religion==