| Calci | |
| Official Name: | Comune di Calci |
| Coordinates: | 43.7167°N 41°W |
| Region: | Tuscany |
| Province: | Pisa (PI) |
| Frazioni: | Castelmaggiore, Crespignano, Gabella, Il Colle-Villa, La Corte-San Piero, La Pieve (municipal seat), Pontegrande-Sant'Andrea, Montemagno, Rezzano-Nicosia, Tre Colli |
| Mayor: | Massimiliano Ghimenti |
| Area Total Km2: | 25.17 |
| Population Total: | 6367 |
| Population As Of: | 30 April 2017 |
| Population Demonym: | Calcesani |
| Elevation M: | 50 |
| Saint: | St. Ermolaus |
| Day: | August 7 |
| Postal Code: | 56011 |
| Area Code: | 050 |
Calci is a comune (municipality) in the Province of Pisa in the Italian region Tuscany, located about 60km (40miles) west of Florence and about 9km (06miles) east of Pisa.
Its main attraction is Pisa Charterhouse, also known as Calci Charterhouse (Certosa di Pisa or di Calci), which houses a natural history museum of the University of Pisa.