Sinalunga is a town and comune in the province of Siena, in the Tuscany region of central Italy.

Aside from scanty prehistoric findings, the oldest historical remains date from the 8th century BC, when Sinalunga was perhaps an Etruscan settlement under the control of Chiusi, with some temple at the top of the hill where Sinalunga lies.

The current town grew up around the medieval castle called Castello delle Ripe, attracting people on the hill after the Etruscan land reclamation works in the area were gradually abandoned.

The town was later under the Cacciaconti family, who became subjects of the commune of Siena in 1197.

This Province of Siena location article is a stub.