Barnacle is a surname. Notable people with the surname include:
Gary Barnacle (born 1959), English musician Nora Barnacle (1884–1951), wife of author James Joyce Pete Barnacle, drummer for a variety of bands Thomas Barnacle (1846–1921), Irish trade unionist
See also Neil Lyndon, (born 1946), English journalist and writer who was born "Neil Barnacle". Barnicle