Breil-sur-Roya (French pronunciation: [bʁɛj syʁ ʁwaja], literally Breil on Roya; Italian: Breglio sul Roia or simply Breglio; Ligurian: Breggio; Occitan: Brelh de Ròia) is a commune in the Alpes-Maritimes department in southeastern France.

Breil-sur-Roya is one of the towns on the route of the SNCF Train des Merveilles which runs between Nice and Cuneo in Italy.

The Roya river runs through town and is open to trout anglers from March to September.

Trout anglers share the river with rafters, another popular local sport.

Major damage occurred to both commercial buildings, to residential homes, and to roads all the way downstream to Ventmiglia, Italy, on the seacoast.