Piazza al Serchio is a comune (municipality) in the Province of Lucca in the Italian region Tuscany, located about 90 km northwest of Florence and about 40 km northwest of Lucca. Piazza al Serchio borders the following municipalities: Camporgiano, Minucciano, San Romano in Garfagnana, Sillano Giuncugnano. The Romanesque stone church of Santa Maria Assunta is located in the frazione of Borsigliana. The town is served by the Piazza al Serchio railway station.