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 William Alexander Orr (1836–1913), member of the Texas House of Representatives
In sports Willie Orr (1873–1946), Scottish football player and manager Willie Orr (footballer, born 1875) (1875–1912), Scottish footballer 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#Results Billy Orr (ice hockey) (born 1948), Canadian professional ice hockey defenceman Will Orr, New Zealand rally driver in 1992 World Rally Championship#Drivers' championship Bill Orr (football coach) (born 1983), Scottish football coach
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
See also William Orr House, a historic home in Center Township, LaPorte County, Indiana Billie Orr, American advocate for political and education reform since 1970