A total of 116 people have served on the
Supreme Court of the United States, the highest judicial body in the
United States, since it was established in 1789. Supreme Court justices have
life tenure, meaning that they serve until they die, resign, retire, or are
impeached and removed from office. For the 107 non-incumbent justices, the
average length of service was 6,203 days (16 years, 359 days). The longest serving justice was
William O. Douglas, with a tenure of 13,358 days (
36 years, 209 days). The longest serving
chief justice was
John Marshall, with a tenure of 12,570 days (
34 years, 152 days).
John Rutledge, who served on the court twice, was both the shortest serving
associate justice, with a tenure of 383 days (
1 year, 18 days), and the shortest serving chief justice, with a tenure of 138 days (
4 months 16 days). Among the current members of the court,
Clarence Thomas's tenure of
12,422 days (
34 years, 3 days) is the longest, while
Ketanji Brown Jackson's
1,214 days (
3 years, 118 days) is the shortest.
The table below ranks all
United States Supreme Court justices by time in office. For five individuals confirmed for associate justice, and who later served as chief justice—
Charles Evans Hughes,
William Rehnquist, John Rutledge,
Harlan F. Stone, and
Edward Douglass White—their cumulative length of service on the court is measured. The basis of the ranking is the difference between dates; if counted by number of calendar days all the figures would be one greater, with the exception of Charles Evans Hughes and John Rutledge, who would receive two days, as each served on the court twice (their service as associate justice and as chief justice was separated by a period of years off the court). The
start date given for each justice is the day they took the prescribed
oath of office, with the
end date being the date of the justice's death, resignation, or retirement. A highlighted row indicates a justice currently serving on the court. (
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