Castelnuovo di Garfagnana is a town and comune located in the province of Lucca within the Tuscany region of central Italy. It serves as the capital of the historical region known as Garfagnana.
The town is situated at the confluence of the Serchio and Turrite Secca rivers. Its geographic location is notable for being near the intersection of roads that pass through both the Apennine Mountains and the Apuan Alps.