William Quinn Hayes (born April 14, 1956) is a senior United States district judge of the United States District Court for the Southern District of California.

- Gender
- Male
- Race
- White
Prior employment
Southern District of CaliforniaAssistant U.S. attorney and chief of Criminal Division · 1987–2003- University of San Diego Law SchoolAdjunct faculty · 1998
Adjunct faculty · 1989–1996- Private practice1983–1986
- University of Colorado at DenverAdjunct faculty · 1985–1986
- National College (now National American University)Adjunct faculty · 1984–1985
Appointments
2003–2021 · Appointed by George W. Bush (Republican)
Education
J.D. · 1983- Syracuse University College of Business AdministrationM.B.A. · 1983
- Syracuse UniversityB.S. · 1978