Roset-Fluans is a commune in the Doubs department in the Bourgogne-Franche-Comté region in eastern France.

The commune lies 8 km (5.0 mi) northwest of Boussières.

It was a refuge for priests during the French Revolution.

Château-le-Bois had 132 inhabitants in 1803, but is now completely covered by forest.

This Doubs geographical article is a stub.