Federal & State Judges
254 judges — Article III appointments from the Federal Judicial Center directory.
- Frank OspinoCurrently serving2015–present
- Carolyn S. Ostby
William Lindsay Osteen Jr.Chief JudgeCurrently servingNorth Carolina Middle District Court · 2007–present
William Lindsay Osteen Sr.North Carolina Middle District Court · 1991–2007- Timothy T. OsterhausCurrently serving2013–present
- Barry R. OstragerCurrently serving2015–present
Clifford Patrick O'SullivanSixth Circuit Court of Appeals · 1957–1975- John J. O'Sullivan
- Patrick Brett O'Sullivan1950–1957
Jill Aiko OtakeCurrently servingHawaii District Court · 2018–present- Alicia Otazo-Reyes
- S. James Otero1990–2003
S. James OteroCalifornia Central District Court · 2003–2020- David Emery Otis
- James C. Otis1961–1982
Merrill E. OtisMissouri Western District Court · 1925–1944- Colleen Mary O'Toole2004–2011
George A. O'Toole Jr.Currently servingMassachusetts District Court · 1995–present- John E. Ott
- Paula Francisco OttCurrently serving2010–present
- Richard B. Ott1955–1967
- T Truett Ott1977–1985
- Frank J Otte1986–2014
- Peter Keith OttenwellerCurrently serving2010–present
- Lisa S. Ottley2000–2032
- James Daniel OttoCurrently serving2003–present
- Daniel Alexander OttoliaCurrently serving2010–present
- John W. Ouderkirk1991–2004
- Karen A Overstreet1994–2015
- Morris L. Overstreet1990–1998
- Murray Overstreet1960–1975
- Scharlene Overstreet
- Ben F. Overton1974–1999
- Carol Weinstein OvertonCurrently serving2005–present
- Paul E. Overton1973–1991
William Ray OvertonArkansas Eastern District Court · 1979–1987- Sharon L. Ovington
- John Byron OwenCurrently serving2014–present
- Knoel L. Owen1998–2009
Richard OwenNew York Southern District Court · 1973–2015- Ronald Eugene Owen1981–2001
- Claude M. Owens1967–1981
- Donald S. OwensCurrently serving1999–present
John Byron OwensCurrently servingNinth Circuit Court of Appeals · 2014–present- Karen OwensCurrently serving2019–present
- Susan OwensCurrently serving2001–present
Wilbur Dawson Owens Jr.Chief JudgeGeorgia Middle District Court · 1972–2010- Brian L Owsley
- Perry L. Owsley1971–1978
- Leo Oxberger1969–1994
- Maria L. OxholmCurrently serving2016–present
- G. Dewey Oxner1944–1962
Halil Suleyman OzerdenChief JudgeCurrently servingMississippi Southern District Court · 2007–present- Wayne M. Ozzi1982–2026