Maddern is a surname. Notable people with the surname include:
Anne Maddern (born 1955), Australian politician Barry Maddern (1937–1994), Australian barrister and jurist Clarence Maddern (1921–1986), American baseball player Philippa Maddern (1952–2014), Australian historian Rebecca Maddern (born 1977), Australian television presenter and journalist Victor Maddern (1928–1993), English actor Richard John Maddern-Williams, music teacher and organist
See also St Maddern's Church, Madron Madron (saint)