William Cleary may refer to:
William E. Cleary (1849–1932), U.S. Representative from New York William J. Cleary (1870–1952), American politician William James Cleary (1885–1973), Australian brewery and railway executive William Castle Cleary (1886–1971), British civil servant Bill Cleary (Australian footballer) (1868–1942), Australian rules footballer Bill Cleary (footballer, born 1931) (1931–1991), English soccer player Bill Cleary (ice hockey) (born 1934), American ice hockey player and coach Bill Cleary (Irish footballer), Irish soccer player