Aldersey is a surname. Notable people with the surname include:
Laurence Aldersey (fl. 1581–1586), English explorer Margaret Aldersley (1852–1940) – British textile worker, suffragist and trade unionist Mary Ann Aldersey (1797–1868), English Christian missionary Olympia Aldersey (born 1992), Australian rower Thomas Aldersey (1521/2–1598), English merchant and philanthropist
See also Hugh Aldersey-Williams (born 1959), English writer and journalist