William Orr

Bill, Billy, Willie or William Orr may refer to:

In activism or public service

 * William Orr (United Irishman) (1766–1797), member of United Irishmen who was executed
 * William Orr (Australian politician) (1843–1929), Australian politician and mining prospector
 * Sir William Orr-Ewing, 2nd Bt. (1848–1903), son of Sir Archibald Orr-Ewing, 1st Baronet
 * William Edwin Orr (1881–1965), American federal judge
 * William Orr (trade unionist) (1900–1954), Australian coal miner and trade unionist
 * Bill Orr (Nebraska first gentleman) (1935–2013), American insurance executive and Nebraska's only First Gentleman

In sports

 * Willie Orr (1873–1946), Scottish football player and manager
 * Willie Orr (footballer, born 1875) (1875–1912), footballer for Fulham F.C.
 * Billy Orr (footballer) (1883–1963), Australian rules footballer
 * Billy Orr (baseball) (1891–1967), Major League Baseball infielder
 * Bill Orr, American racing driver in 1964 and 1965 Armstrong 500
 * Billy Orr (ice hockey) (born 1948), Canadian professional ice hockey defenceman
 * Will Orr, New Zealand rally driver in 1992 World Rally Championship
 * Bill Orr (football coach) (born 1983), Scottish Football Coach, Head of Performance Analysis for Stirling Albion Football Club

Other

 * William Somerville Orr (before 1820–1873), English publisher and founder of William S Orr & Co.
 * William McFadden Orr (1866–1934), British and Irish mathematician
 * William Orr, American architect who built 1928 First Presbyterian Church (San Luis Obispo, California)
 * William Orr, Scottish theatre director who immigrated to Australia and founded Phillip Street Theatre in 1953
 * William T. Orr (1917–2002), American television producer
 * William I. Orr (1919–2001), American amateur radio licensee and author