William Bernard may refer to:
William Bernard (sailor) ( 1849), sailor known as the notorious "Barnacle Bill" of American yore William Bayle Bernard (1807–1875), American-born London playwright and drama critic William Larkins Bernard (1843–1922), English architect William Smyth Bernard (1792–1863), Irish politician
See also Billy Bernard (born 1991), Luxembourger international footballer Will Bernard, American guitarist and band leader