Supreme Court justices have life tenure, meaning that they serve until they die, resign, retire, or are impeached and removed from office.
The table below ranks all United States Supreme Court justices by time in office.
[C] 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).
A highlighted row indicates a justice currently serving on the court.