Alldis is a surname. Notable people with the surname include:
Barry Alldis (1930–1982), Australian radio personality Dominic Alldis (born 1962), English jazz musician Gillie Alldis (1920–1998), English footballer Jim Alldis Jr. (1949–2023), English cricketer Jim Alldis Sr. (1916–1995), English cricket scorer and manager John Alldis (1929–2010), English conductor Michael Alldis (born 1968), English boxer Septimus Alldis (1886–1929), Australian politician