William Daniel Quarles Jr. (born January 16, 1948) is a former United States district judge of the United States District Court for the District of Maryland.

- Gender
- Male
- Race
- African American
Prior employment
- Maryland Circuit Court, Baltimore CityAssociate judge · 1996–2003
- Private practice, Baltimore, Maryland1986–1996
District of MarylandAssistant U.S. attorney · 1982–1986- Private practice1981–1982
Law clerk , Hon. Joseph C. Howard · 1979–1981
Appointments
2003–2016 · Appointed by George W. Bush (Republican)Term ended: Retirement
Education
- Catholic University of America, Columbus School of LawJ.D. · 1979
- University of MarylandB.S. · 1976
- Community College of BaltimoreA.A. · 1967