| Lastra a Signa | |
| Official Name: | Comune di Lastra a Signa |
| Coordinates: | 43.7667°N 17°W |
| Region: | Tuscany |
| Metropolitan City: | Florence (FI) |
| Frazioni: | Belfiore, Bracciatica, Brucianesi, Calcinaia, Carcheri, Ginestra Fiorentina, Inno, La Lisca, La Luna, Lecceto, Malmantile, Marliano, Ponte a Signa, Ponte Torto, Porto di Mezzo, Quattro Strade, San Martino a Gangalandi, San Romolo, Sant'Ilario a Settimo, Stagno, Val di Rose. |
| Mayor: | Angela Bagni |
| Area Total Km2: | 43.1 |
| Population Footnotes: | [1] |
| Population Total: | 20252 |
| Population As Of: | 31 August 2017 |
| Population Demonym: | Lastrigiani |
| Elevation M: | 36 |
| Saint: | St. Martin of Tours |
| Day: | November 11 |
| Postal Code: | 50055 |
| Area Code: | 055 |
Lastra a Signa is a comune (municipality) in the metropolitan city of Florence in the Italian region Tuscany, located about 12km (07miles) west of Florence.
Lastra a Signa is twinned with:
Grosio, Italy, since 1989
Saint-Fons, France, since 1995
Munster, Germany, since 2015