Bonatti is an Italian surname. Notable people with the surname include:
Andrea Bonatti (born 1984), Italian football coach Fernando Bonatti (1894–1974), Italian gymnast Guido Bonatti (died c. 1300), Italian astronomer Matteo Bonatti (born 1981), Italian footballer Roberta Bonatti (born 1997), Italian female boxer and athlete Walter Bonatti (1930–2011), Italian mountain climber