William, Bill, or Billy Chapman may refer to:
Arts and entertainment William Chapman (poet) (1850–1917), Canadian poet William Chapman (baritone) (1923–2012), American opera singer and actor William Rogers Chapman (1855–1935), American conductor, organist, pianist, composer, and music educator Billy Chapman (character), a fictional character in the Silent Night, Deadly Night franchise.
Law and politics William Chapman (MP for Arundel) (fl. 1416), English politician, MP for Arundel William Chapman (MP for Bath) (fl. 1626), English politician, MP for Bath William W. Chapman (1808–1892), American politician and lawyer Bill Chapman (politician) (1910–1971), Australian politician in New South Wales
Sports William Chapman (cricketer, fl. 1803), English professional cricketer William Chapman (Cambridgeshire cricketer), English professional cricketer Bill Chapman (footballer), New Zealand footballer Billy Chapman (footballer) (1902–1967), English footballer
Others William Chapman (engineer) (1749–1832), English engineer William Chapman (doctor) (1797–1867), British-born doctor in New Zealand William E. Chapman (fl. 1920s), American diplomat William Chapman (journalist) (born 1930), American journalist
See also Killing of William Chapman, 2015 police shooting William Chapman Hewitson (1806–1878), British naturalist William Chapman Nyaho (born 1958), Ghanaian-American concert pianist William Chapman Ralston (1826–1875), American founder of the Bank of California Chapman Mortimer, pen name of British writer William Charles Chapman Mortimer (1907–1988) Robert William Chapman (disambiguation)