The Val d'Orcia or Valdorcia (Italian: [ˌvalˈdortʃa]) is a region of Tuscany, central Italy, which extends from the hills south of Siena to Monte Amiata.

Its gentle, cultivated hills are occasionally broken by gullies and by towns and villages such as Pienza (rebuilt as an "ideal town" in the 15th century under the patronage of Pope Pius II),[1] Radicofani (home to the notorious brigand-hero Ghino di Tacco) and Montalcino (the Brunello di Montalcino is counted among the most prestigious of Italian wines).

Here Sangiovese and Trebbiano-based wines are produced under the Orcia Denominazione di origine controllata (DOC) status.

The DOC red wine is composed of at least 60 per cent Sangiovese with other local varieties, such as Abrusco, permitted to fill in the remainder of the blend.

The scenic line connects the small town of Asciano with Monte Antico using historic steam engines and carriages on selected dates throughout the year, to serve visitors to local festivals.