William Duffy Keller (October 29, 1934 – November 2, 2025) was a United States district judge of the United States District Court for the Central District of California.

William Duffy Keller
California Central District Court
Born 1934 in Los Angeles, CA
Died 2025
FJC ID: 1248
- Gender
- Male
- Race
- White
Prior employment
Private practice · 1964–1972, 1977–1984
U.S. attorney for the Central District of California1972–1977
Southern District of CaliforniaAssistant U.S. attorney · 1961–1964
Appointments
1984–2025 · Appointed by Ronald Reagan (Republican)Term ended: Death
Education
- University of California, Los Angeles, School of LawLL.B. · 1960
- University of California, BerkeleyB.S. · 1956