William Weir
# William Weir

William Weir may refer to:

* William Alexander Weir (1858–1929), Quebec lawyer and politician
* William Weir (architect) (1865–1950), Scottish restorer of historic buildings
* William Weir, 1st Viscount Weir (1877–1959), Scottish industrialist
* William Weir, 3rd Viscount Weir (born 1933), British peer and businessman
* William Gilbert Weir (1896–1971), Canadian politician
* Bill Weir (born 1967), co-anchor of Good Morning America Weekend Edition
* Bill Weir (footballer), Australian rules footballer
* William Weir (aviator) (1891–?), World War I flying ace
* William Weir (trade unionist) (1868–?), British coal miner and politician
