William McKennan (September 27, 1816 – October 27, 1893) was a United States circuit judge of the United States Circuit Courts for the Third Circuit.

William McKennan
Born 1816 in Washington, PA
Died 1893 in Pittsburgh, PA
FJC ID: 1568
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Washington, Pennsylvania1837–1852
- Washington Borough, PennsylvaniaBurgess · 1847
Washington County, PennsylvaniaDeputy attorney general · 1837–1839
Appointments
1869–1891 · Appointed by Ulysses Grant (Republican)Term ended: Retirement
Education
- Yale College
- Yale University
- Read law1837
- Washington College (now Washington and Jefferson College)1833