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 Petersen (demographer) (1912–2004), American sociologist and demographer William Petersson (1895–1965), Swedish athlete William Pedersen (disambiguation) William G. Pietersen (born 1937), businessman and author Billy Peterson, American bass player and songwriter