Allin is both a surname and a given name. Notable people with the name include:
Surname: Buddy Allin (1944–2007), American golfer GG Allin (1956–1993), punk rock singer-songwriter and musician Merle Allin (born 1953), American bassist Norman Allin (1884–1973), British bass singer Roger Allin (1848–1936), American politician Rosena Allin-Khan, British politician Sir Thomas Allin, 1st Baronet (17th century), English naval officer
Given name: Allin Braund (1915–2004), British artist Allin H. Pierce (1897–1980), American judge Eric Allin Cornell (born 1961), American physicist
See also Alan (disambiguation) Alen (given name) Allan (disambiguation) Alleine Allen (disambiguation) Allín Allin baronets Allin Township