William Peterson may refer to:
Academics
William H. Peterson (1921–2012), economist, writer, and speaker following the ideas of Ludwig von Mises William Peterson (academic) (1856–1921), Scottish academic and Principal of McGill University, Canada William Peterson (priest), Dean of Carlisle, and of Exeter W. Wesley Peterson (1924–2009), American mathematician and computer scientist
Politicians
William Peterson (MP) (died 1578), Member of Parliament (MP) for Lewes
William E. Peterson (born 1936), Republican member of the Illinois Senate
William H. Peterson (politician), member of the 1865–1867 California State Assembly
Sports
Bill Peterson (1920–1993), American football coach
Bill Peterson (linebacker) (born 1945), American football player
Bill Peterson (basketball) (born 1957), director of basketball operations at Baylor University William James (American football) (William James Peterson, Jr., born 1979), American football cornerback William Peterson (footballer), British footballer in the early 20th-century
See also
William Petersen (born 1953), American actor
William Petersson (1895–1965), Swedish athlete
William Pedersen (disambiguation) William G. Pietersen (born 1937), businessman and author