Rohan (French pronunciation: [ʁɔɑ̃]; Breton: Roc'han) is a commune in the Morbihan department in Brittany in north-western France. Inhabitants of Rohan are called Rohannais.

It is the home to the House of Rohan, members of which included viscounts, dukes and princes and has had a prominent role in French history. The commune's coat of arms is identical to that of the family.

Rohan is situated on the banks of the river Oust and the Canal from Nantes to Brest (which merge for a part of their journey), upstream of Josselin and at the edge of a plateau.

• Communes of the Morbihan department

• Base Mérimée: Search for heritage in the commune, Ministère français de la Culture. (in French)
• Mayors of Morbihan Association (in French)