James Buchanan's Cabinet
President: James Buchanan (1857-1861)
Vice President: John C. Breckinridge (1857-1861)
Secretary of State: Lewis Cass (1857-1860), Jeremiah S. Black (1860-1861)
Secretary of the Treasury: Howell Cobb (1857-1860), Philip Francis Thomas (1860-1861)
Secretary of War: John B. Floyd (1857-1860)
Attorney General: Jeremiah S. Black (1857-1860), Edwin Stanton (1860-1861)
Postmaster General: Aaron V. Brown (1857-1859), Joseph Holt (1859-1860)
Secretary of the Navy: Isaac Toucey (1857-1861)