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
{{hndis, Bernard, William