San Vincenzo () is an Italian commune in the province of Livorno, a Tuscan town in central-Italy.
San Vincenzo is located on the Ligurian Sea, about southeast of Livorno and about southwest of Florence, in the part of coast which stretches from Livorno to Piombino, also known as Etruscan coast (in Italian: Costa degli Etruschi). The town develops on the Maremma livornese and it is bounded in the north by the comune of Castagneto Carducci and in the south by Piombino and the Rimigliano Coastal Park.
San Vincenzo is a seaside resort. In 2006 it received its first Blue Flag, awarded for its clear water, which was then also awarded from 2007 to 2023. ÃÂ
Walter Mazzarri, a football coach, former manager of Watford F.C. and former football player, was born in San Vincenzo in 1961.