Val di Pesa | Italian for Valley of the River Pesa. The Pesa river runs for 33 miles (53 km) whilst traversing the Provinces of Florence and Siena in Tuscany, Italy. The river is effectively a seasonal torrent in parts and remains without water in its final stretch during the summer. The Pesa arises from the confluence of several tributaries in the area located between the Badiaccia in Montemura (675 m) and Badia a Coltibuono (628 m) at the border of the provinces of Siena and Florence. After descending to the south-west to the so-called Palace of Radda, the river turns to the north-west and maintains this direction, touching Sambuca Val di Pesa in the municipality of Tavarnelle Val di Pesa and then Bargino and Cerbaia in the municipality of San Casciano in Val di Pesa, San Vincenzo a Torri in the municipality of Scandicci, Ginestra Fiorentina in the municipality of Lastra a Signa and finally crosses the town of Montelupo Fiorentino where it flows into the Arno.

Towns and villages along the Val di Pesa that incorporate the valley name into their own include Sambuca Val di Pesa, Tavarnelle Val di Pesa, San Casciano in Val di Pesa, Mercatale Val di Pesa, Bargino in Val di Pesa, Montagnana in Val di Pesa, and Cerbaia in Val di Pesa.