Ardern (pronounced , or ) is a surname of English origin.
Notable people with the surname include:
Barry Ardern (born 1946), Canadian football player Jacinda Ardern (born 1980), the 40th prime minister of New Zealand Lawrence Ardern (1523–1570), English politician Ross Ardern (born 1954), New Zealand diplomat and the father of Jacinda Ardern Shane Ardern (born 1960), New Zealand politician