William Mason may refer to: William Mason (gunsmith) (1837–1913), American engineer and inventor working for Remington, Colt, and Winchester William Mason (composer) (1829–1908), American composer and pianist William Mason (locomotive builder) (1808–1883), built locomotives at his Mason Machine Works between 1853 and 1889, including: William Mason (locomotive), steam locomotive built by the aforementioned builder for the Baltimore and Ohio Railroad and later named in his honor William Mason (architect) (1810–1897), architect and first mayor of Dunedin, New Zealand William Mason (stenographer) (fl. 1672–1709), English writing-master William Mason (poet) (1724–1797), English poet, editor and gardener William Mason (religious writer) (1719–1791), Calvinist author and editor of the Gospel Magazine William Mason (New York politician) (1786–1860), United States Representative from New York William D. Mason (born 1959), prosecutor from Cuyahoga County, Ohio William E. Mason (American politician) (1850–1921), U.S. Representative and Senator from Illinois William E. Mason (Canadian politician) (1866–1951), former mayor of Regina, Saskatchewan, Canada William E. Mason (East St. Louis mayor), former mayor of East Saint Louis, Illinois William Mason (1757–1818), American militiaman in the American Revolutionary War and Virginia planter William Temple Thomson Mason (1782–1862), Virginia farmer, businessman and politician William Mason, 1st Baron Blackford (1862–1947), British politician and public servant William Shaw Mason (1774–1853), statistician and bibliographer William Mason (cricketer) (1811–1865), English cricketer William Pinckney Mason (1843–1922), lieutenant in the Confederate States Navy William S. Mason (1832–1899), mayor of Portland, Oregon, 1891–1894 and 1898–1899 William H. Mason, inventor of masonite William Mason (1760–1830), Revolutionary War soldier, founder of city of Mason, Ohio Bill Mason (1929–1988), Canadian canoeist and author William Mason, a pseudonym of William W. Johnstone Willie Mason (born 1980), Australian rugby league footballer Willy Mason (born 1984), singer-songwriter William Mason (Downton Abbey), a fictional character on the series Downton Abbey, played by Thomas Howes William Mason, director of the Lyric Opera of Chicago See also Bill Mason (disambiguation)