Avanzini is a surname. Notable people with the surname include:
Anna Avanzini (1917–2011), Italian gymnast Bartolomeo Avanzini (1608–1658), Italian architect Daniela Avanzini (born 2004), American dancer and singer Giuseppe Avanzini (1753–1827), Italian mathematician and prelate Michel Avanzini (born 1989), Swiss footballer Pietro Antonio Avanzini (1656–1733), Italian painter Sebastian Avanzini (born 1995), Italian footballer Vittoria Avanzini (1915–2001), Italian gymnast