Hon. William Q. Hayes


District Judge

United States District Court, Southern District of California

Judge William Q. Hayes Headshot

Hon. William Q. Hayes


Judge Hayes is a United States District Judge for the Southern District of California. He was appointed a District Judge on October 3, 2003, and assumed senior status on August 1, 2021. Prior to his appointment, Judge Hayes was an Assistant United States Attorney, Southern District of California, 1987 to 2003, serving as Chief of the Criminal Division from 1999 to 2003. He previously practiced law in Denver, Colorado, as an associate at Stone and Associates from 1984 to 1986, and as an associate at Scheid and Horlbeck from 1983 to 1984. Judge Hayes has served as an adjunct faculty member at National College in Denver, Colorado; University of Colorado at Denver; Thomas Jefferson School of Law in San Diego, California; and University of San Diego School of Law.


  • Syracuse University College of Law, J.D., 1983
  • Whitman School of Management at Syracuse University, M.B.A., 1983
  • Syracuse University, B.A., 1979

Professional Activities

  • Board of Directors, San Diego Inn of Court
  • Judicial Board of Governors, San Diego Association of Business Trial Lawyers
  • Honorary Member, Syracuse University College of Law Board of Advisors

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