Avancini is a surname. Notable people with the surname include:
Henrique Avancini (born 1989), Brazilian mountain bike racer and road cyclist Ingryd Avancini (born 1998), Brazilian professional footballer Lívia Avancini (born 1992), Brazilian athlete specialising in the shot put Nicola Avancini (1611–1686), Italian Jesuit cleric, playwright, and ascetical writer