Vannini is an Italian surname. Notable people with the surname include:
Alessandro Vannini (born 1938) Elia Vannini (1637–1695): Italian Baroque composer and Carmelite friar Giuditta Vannini (1859–1911) Marco Vannini (born 1943), Italian biologist Pietro Vannini (1413/1414–1495/1496), Italian artist and silversmith Ottavio Vannini (1585– 1643), Italian Baroque painter See also Lucilio Vanini