List of people who have served in all three branches of the United States federal government

Following is a list of persons who have served in all three branches of the United States federal government. Membership in this list is limited to persons who have:

Twenty-seven men can claim to have served in all three federal government branches. The first person to achieve this distinction was John Marshall, when he was confirmed to the Supreme Court in 1801, having briefly served in Congress and as Secretary of State. The most recent person to join the list was James L. Buckley, who had already been President of Radio Free Europe/Radio Liberty and a U.S. Senator when he was appointed to the Second Circuit Court of Appeals in 1985.

Of those who have served in all three branches, ten served as a United States Attorney; five served as Attorney General; four served as Secretary of the Navy; three served as Secretary of the Treasury; two served as Secretary of State; two served as Secretary of the Interior; two served as Director of the Office of Economic Stabilization; one served as Secretary of Labor; one served as Secretary of War; one served as Postmaster General, while this office was still a cabinet post. Three held multiple Cabinet posts. Although many Presidents and Vice Presidents have also served in Congress, and one later served on the Supreme Court, none has ever served in all three branches.

With respect to legislative service, ten of these men were Senators and eighteen were Representatives (including four who served in both houses). The states from which they were elected are largely diverse, with only three states having multiple members on the list: Virginia had four, Ohio had three, and Maine had two.

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