William Forsyth

William Forsyth may refer to:


 * William Forsyth (artist) (1854–1935), American Impressionist painter
 * William Forsyth (athlete) (1891–1939), Canadian long-distance runner
 * William Forsyth (barrister) (1812–1899), Scottish lawyer and Member of Parliament
 * William Forsyth (horticulturist) (1737–1804), Scottish botanist
 * William Forsyth (merchant) (1722–1800), Scottish merchant
 * William Forsyth (rugby union) (born 1850), international player who represented Scotland
 * William Forsyth (writer) (1818–1879), Scottish poet and journalist
 * William Austin Forsyth, Canadian politician
 * Will Forsyth (1996–2020), rugby league footballer who played in the 2010s
 * Bill Forsyth (diplomat) (1909–1993), Australian diplomat
 * Bill Forsyth (born 1946), Scottish film director and writer