Judge Duffy may refer to:

  • F. Ryan Duffy (1888–1979), judge of the United States Court of Appeals for the Seventh Circuit
  • Kevin Duffy (1933–2020), judge of the United States District Court for the Southern District of New York
  • Patrick Michael Duffy (born 1943), judge of the United States District Court for the District of South Carolina

See also

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  • William S. Duffey Jr. (born 1952), judge of the United States District Court for the Northern District of Georgia