<Tr> <Td> 7002208000000000000 ♠ 208 days Neil Gorsuch since 2017 </Td> </Tr> <Tr> <Td> 163 days Thomas Johnson from 1792 to 1793 </Td> </Tr> <P> A total of 113 Justices have served on the Supreme Court of the United States, the highest judicial body in the United States . Justices have life tenure, and so they serve until they die in office, resign or retire, or are impeached and removed from office (which has never happened; the one impeached Justice was acquitted). The longest - serving member of the current court is Associate Justice Anthony Kennedy, with a term to date of 7004108520000000000 ♠ 10,852 days (29 years). For the 104 non-incumbent justices, the mean length of service was 6,112 days (16.7 years) with a standard deviation of 3,620 days (9.9 years). The median length of service was 5,740 days (15.7 years). Their period of service ranges from William O. Douglas's 13,358 days (36 years) on the Court to the 163 - day tenure of Thomas Johnson . </P> <P> A nominee who was confirmed by the United States Senate but declined to serve, such as Robert H. Harrison, or who died before taking his seat, such as Edwin M. Stanton, is not considered to have served as a Justice . The Term Start date is the day the Justice took the oath of office, with the Term End date being the date of the Justice's death, resignation, or retirement . A highlighted row indicates that the Justice is currently serving on the Court . </P>

Who is currently the longest serving supreme court justice