The following is an alphabetical list of political families in the United States whose last name begins with J.
NOTE: Claiborne Fox Jackson was also brother-in-law of Missouri Governor Meredith Miles Marmaduke and uncle of Missouri Governor John Sappington Marmaduke.
NOTE: John Jay was also son-in-law of Continental Congressional Delegate William Livingston, brother-in-law of John Cleves Symmes and U.S. Supreme Court Justice Brockholst Livingston, nephew by marriage of New York Colony Assemblymen Robert Livingston and Peter Van Brugh Livingston and Continental Congressional Delegate Philip Livingston, and first cousin by marriage of New York Assemblyman Peter R. Livingston, Continental Congressional Delegate Walter Livingston, and New York State Senator Philip Livingston.
NOTE: Thomas Jefferson was also third cousin of U.S. Secretary of State John Marshall and second cousin once removed of U.S. Senator William Segar Archer. Dabney S. Carr was also nephew of U.S. Court of Appeals Judge Dabney Carr. T. Jefferson Coolidge was also son-in-law of U.S. Representative William Appleton. Lloyd L. Gravely was also descendant of Continental Congressional Delegate Patrick Henry.
NOTE: Robert W. Johnson was also brother-in-law of U.S. Senator Ambrose Sevier.