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Saint-Quay-Perros (French pronunciation: [sɛ̃ kɛ pɛʁɔs] ; Breton: Sant-Ke-Perroz) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Perros-Guirec (French pronunciation: [pɛʁɔs ɡiʁɛk]; Breton: Perroz-Gireg) is a commune in the department of Côtes-d'Armor in Brittany. It has been a seaside resort since the end of the 19th century.

Trélévern (French pronunciation: [tʁelevɛʁn]; Breton: Trelêvern) is a commune in the Côtes-d'Armor department of Brittany in northwestern France located at the intersection of the touristic Côte de granit rose (pink granite Coast) and the quieter and wilder Côte des ajoncs d'or (golden gorses Coast).

The canton of Perros-Guirec is an administrative division of the Côtes-d'Armor department, northwestern France. Its borders were not modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Perros-Guirec.It consists of the following communes:

Kermaria-Sulard (French pronunciation: [kɛʁmaʁja sylaʁ]; Breton: Kervaria-Sular) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Trévou-Tréguignec (French pronunciation: [tʁevu tʁegiɲɛk]; Breton: An Trevoù) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Trézény (French pronunciation: [tʁezeni]; Breton: Trezeni) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Rospez (French pronunciation: [ʁɔspɛs] ; Breton: Rospezh) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

Coatréven (French pronunciation: [kwatʁevɛ̃]; Breton: Koatreven) is a commune in the Côtes-d'Armor department of Brittany in northwestern France.

The arrondissement of Lannion is an arrondissement of France in the Côtes-d'Armor department in the Brittany region. It has 57 communes. Its population is 99,903 (2016), and its area is 904.4 km2 (349.2 sq mi).

Communauté d'agglomération Lannion-Trégor Communauté is an intercommunal structure, centred on the city of Lannion. It is located in the Côtes-d'Armor department, in the Brittany region, western France. It was created in January 2017. Its seat is in Lannion. Its area is 904.4 km2. Its population was 99,607 in 2017, of which 19,880 in Lannion proper.

Lannion (French pronunciation: [lanjɔ̃] ; Breton: Lannuon) is a commune in the Côtes-d'Armor department in Brittany in northwestern France. It is a subprefecture of Côtes-d'Armor, the capital of Trégor and the center of an urban area of almost 60,000 inhabitants.