Bil, Bill, Billy or William Baird may refer to:
Politicians William Baird (MP) (1796–1864), Scottish industrialist and Tory MP for Falkirk Burghs William L. Baird (1843–1916), American mayor of Lynn, Massachusetts William Alexander Baird (1867–1940), Canadian member of Legislative Assembly of Ontario, a/k/a W. A. Baird
Sportsmen William Baird (footballer) (1874–1943), Scottish centre half for Dundee Billy Baird (footballer) (1876–after 1897), Scottish forward in Football League for Stoke Billy Baird (1884–1968), Canadian pioneering professional ice hockey player Bill Baird (American football) (born 1939), American defensive back for New York Jets Bill Baird (racing driver) (born 1949), American champion of ARCA Bondo/Mar-Hyde stock car series
Writers William Baird (physician) (1803–1872), Scottish author of The Natural History of the British Entomostraca (1850) William Teel Baird (1819–1897), Canadian military historian in New Brunswick William Raimond Baird (1848–1917), American publisher of Baird's Manual of American College Fraternities William M. Baird (1862–1931), American Presbyterian missionary, diarist and man of letters Bill Baird (activist) (born 1932), American reproductive rights pioneer, founder of Pro Choice League Bill Baird (musician), American experimental technologist and writer for San Antonio Current since 2000
Others Bil Baird (1904–1987), American TV and film puppeteer
See also Baird baronets