Allanson is a surname. Notable people with the surname include:
Andy Allanson (born 1961), American baseball player Ashley Allanson (born 1986), English professional footballer Noel Allanson (1925–2022), Australian rules footballer Robert Allanson (1735–1846), British architect Rowland Allanson-Winn, 5th Baron Headley (1855–1935), Irish peer Susie Allanson (born 1952), American country music singer and actress
See also Allanson, Western Australia