Sidney R. Thomas

Sidney R. Thomas
Thomas in 2010
Senior Judge of the United States Court of Appeals for the Ninth Circuit
Assumed office
May 4, 2023
Chief Judge of the United States Court of Appeals for the Ninth Circuit
In office
December 1, 2014 – December 1, 2021
Preceded byAlex Kozinski
Succeeded byMary H. Murguia
Judge of the United States Court of Appeals for the Ninth Circuit
In office
January 4, 1996 – May 4, 2023
Appointed byBill Clinton
Preceded byDorothy Wright Nelson
Succeeded byAnthony Johnstone
Personal details
Born
Sidney Runyan Thomas

(1953-08-14) August 14, 1953 (age 71)
Bozeman, Montana
Political partyDemocratic
EducationMontana State University (BA)
University of Montana (JD)

Sidney Runyan Thomas (born August 14, 1953) is an American lawyer and jurist serving as a senior U.S. circuit judge of the United States Court of Appeals for the Ninth Circuit since 1996. He served as the Ninth Circuit's chief judge from 2014 to 2021. His chambers are located in Billings, Montana.