Barnacle Bill

Barnacle Bill may refer to:
 * "Barnacle Bill" (song), an American drinking song
 * William Bernard (sailor), subject of the song
 * "Barnacle Bill", the theme tune of the children's TV programme Blue Peter
 * Barnacle Bill (Martian rock), a 40-cm rock on Mars in Ares Vallis
 * Barnacle Bill (1930 film), a Fleischer Studios animated short film
 * Barnacle Bill (1935 film), a film starring Archie Pitt and Joan Gardner
 * Barnacle Bill (1941 film), a film starring Wallace Beery and Marjorie Main
 * Barnacle Bill (1957 film), an Ealing Studios comedy film starring Alec Guinness
 * Barnacle Bill, Popeye's rival for Olive Oyl in the 1935 animated cartoon Beware of Barnacle Bill
 * Barnacle Bill and the Seven Seas, a fictional musical group in the animated series SpongeBob SquarePants