William Clarkson (1859–1934) was a co-founder and Admiral of the Royal Australian Navy
William Clarkson, Willy Clarkson, Bill Clarkson or Billy Clarkson may also refer to:
Willy Clarkson (1861–1934), theatrical costume designer and wigmaker Billy Clarkson (1891–1954), English professional footballer William Clarkson (cricketer), 1920s Warwickshire cricketer William Clarkson (missionary), 19th-century Irish missionary William Herbert Clarkson (1872–?), artist Bill Clarkson (1898–1971), pitcher in Major League Baseball
See also Clarkson (disambiguation) Clarkson (surname)