William Ross

William Ross may refer to:

• William Ross, Baron Ross of Marnock (1911–1988), Secretary of State for Scotland in the 1960s
• William Ross (Canadian politician) (1824–1912), merchant, ship builder and politician in Nova Scotia, Canada
• William Cecil Ross (1911–1998), leader of the (communist) Labour Progressive Party of Manitoba in 1945
• William Gladstone Ross (1889–1948), lawyer, judge and politician in Saskatchewan, Canada
• William Ross (Unionist politician) (born 1936), Ulster Unionist Party member of Parliament until 2001
• William Ross (speaker), New York politician, Speaker of the State Assembly 1814
• William Ross (Ontario politician) (1854–1937), merchant and politician in Ontario, Canada
• William B. Ross (1873–1924), Governor of Wyoming
• William Benjamin Ross (1855–1929), Canadian politician, lawyer and businessman
• William Cecil Ross (1911–1998), politician in Manitoba, Canada, and the leader of that province's Communist Party
• William Donald Ross (1869–1947), financier, banker and Lieutenant Governor of Ontario
• William H. H. Ross (1814–1887), American politician and former governor of Delaware
• William Roderick Ross (1869–1928), lawyer and politician in British Columbia, Canada
• Bill Ross (Australian politician) (1888–1966), member of the New South Wales Legislative Assembly
• William Henry Ross, provincial level politician from Alberta, Canada

• William Ross (cricketer), Australian cricketer
• William Ross (footballer), English professional footballer active in the 1890s
• William Ross (rower) (born 1900), Canadian Olympic rower
• William Ross (water polo) (born 1928), US water polo player who competed in the 1956 Summer Olympics
• William Alexander Ross (1913–1942), Scottish rugby player

• William I of Ross, anglicized form of Uilleam I, Earl of Ross
• William II of Ross, anglicized form of Uilleam II, Earl of Ross
• William Ross, 8th Lord Ross (died 1640), Scottish nobleman
• William Ross, 10th Lord Ross (died 1656), Scottish nobleman
• William Ross, 12th Lord Ross (died 1738), Scottish nobleman, soldier and politician
• William Ross, 14th Lord Ross (died 1754), Scottish nobleman