William Bass

William, Bill or Billy Bass may refer to:
 * William M. Bass (born 1928), American forensic anthropologist
 * Sir William Bass, 2nd Baronet (1879–1952), British racehorse owner
 * William Bass (brewer) (1717–1787), British entrepreneur founder of Bass Brewery
 * Bill Bass (1922–1967), Canadian football player
 * Big Mouth Billy Bass, an animatronic fish
 * Billy Bass Nelson (born 1951), American musician