William Lynch may refer to:
Politicians and lawyers William Lynch (diplomat) (c. 1730–1785), British Member of Parliament for Canterbury and Minister to Sardinia William Lynch (Lynch law) (1742–1820), American military officer who claimed to be the originator of the term Lynch Law William Lynch (Maryland politician) (1788–1857), American politician from Maryland William A. Lynch (1844–1907), Ohio lawyer and politician William Warren Lynch (1845–1916), Canadian lawyer, politician, and judge in the province of Quebec William H. Lynch (), Mississippi legislator William Joseph Lynch (1908–1976), U.S. federal judge William Lynch Jr. (1941–2013), Deputy Mayor of New York City under David Dinkins and political consultant William B. Lynch (born 1943), Adjutant General of Pennsylvania William Lynch (Toronto politician) ()
Sportsmen Bill Lynch (footballer) (1892–1947), Australian rules footballer Billy Lynch (Australian footballer) (1909–1985), played for North Melbourne and Essendon Billy Lynch (rugby league), rugby league footballer of the 1900s, and 1910s for England, Yorkshire, and Wakefield Trinity Bill Lynch (born 1954), American football player and coach William Lynch (hammer thrower) (born 1916), American hammer thrower, runner-up at the 1938 USA Outdoor Track and Field Championships
Others William F. Lynch (1801–1865), captain in the Virginia Navy, who commanded southern forces during the Union attack on Fort Fisher, North Carolina William Francis Lynch (general) (1839–1876), U.S. Army officer Willie Lynch, the probably fictional author of the dubious William Lynch speech