Allender is a surname. Notable people with the surname include:
Bruce M. Allender, a phycologist with the standard author abbreviation "Allender" Eric Allender (born 1956), American computer scientist Henry Allender (1872–1939), Australian rules footballer Nina E. Allender (1873–1957), American artist and activist Paul Allender (born 1970), English guitarist Stephen Allender (born 1960), Australian rules footballer