Federal & State Judges
15,932 judges — Article III appointments from the Federal Judicial Center directory.
- Warren H. Orr1930–1939
William Edwin OrrNinth Circuit Court of Appeals · 1939–1965
William Horsley Orrick IIICalifornia Northern District Court · 2013–present
William Horsley Orrick Jr.California Northern District Court · 1974–2003
Matthew Emile OrsoCurrently servingNorth Carolina Western District Court · 2025–present- Darleen OrtegaCurrently serving2003–present
- Reuben A. Ortega1984–1988
- Charles E. Orth jrCourt of Appeals of Maryland · 1976–1980
- Revius Ortique jr1993–1994
- Elia Ortiz2012–2019
- Andrew L. Osborn1871–1875
- Walter , Jr. Osborn1965–1983
- Earl T. Osborne1967–1975
- Edwin M. Osborne1986–1994
- Leslie Lester Osborne2019–2024
Diarmuid Fionntain O'ScannlainNinth Circuit Court of Appeals · 1986–present- Eugene Osko
- Benny C. Osorio2008–2018
- Thomas J. OsowikCurrently serving2007–present
- 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
- Rod J. Paasch
William PacaMaryland District Court · 1790–1799- Annemarie G. PaceCurrently serving2007–present
- John Manuel PachecoCurrently serving2001–present
- Randall Frank PachecoCurrently serving2009–present
- Richard Edward PachecoCurrently serving2016–present
- Jerry Pacht1966–1985
- Israel Packel1977–1978
Martha Maria PacoldCurrently servingIllinois Northern District Court · 2019–present- Gary L. Paden2005–2016
- Frank D. Padgett1980–1992
- J Rogers Padgett1974–2008
- Jose Padilla1995–2024
Evelyn PadinCurrently servingNew Jersey District Court · 2022–present
John R. PadovaPennsylvania Eastern District Court · 1992–2008- Philip J. PadovanoCurrently serving1996–present
- Leonard C. Paduano
- Kathryn S. PaekCurrently serving2011–present
- Gary Scott PaerCurrently serving2000–present
Richard A. PaezNinth Circuit Court of Appeals · 1994–present- Alan C. PageCurrently serving1993–present
- E. M. Page1949–1950
- George True PageSeventh Circuit Court of Appeals · 1919–1941
- Roger A. PageCurrently serving2011–present
- James V. Paige
- Harkjoon Paik1975–1996
- Bayard H. Paine1931–1949