Lannion has Celtic origins, dating back to the 5th century BC, and served as a significant port during the Middle Ages.

The city is situated on the northern coast of Brittany, at the mouth of the Léguer River estuary, benefiting from picturesque coastal views.

As of 2020, Lannion has a population of around 20,000 inhabitants, making it the fourth-largest city in Côtes-d'Armor.

The economy of Lannion is primarily driven by telecommunications and electronics industries, with a strong presence of companies like Alcatel-Lucent and Orange.

The city boasts a rich cultural heritage, home to several museums, including the Musée d'Art et d'Histoire de Lannion, which showcases the region's history and traditions.

Lannion is renowned for its Fête des Lumières, an annual festival that illuminates the city's streets with vibrant light displays and performances.

The local cuisine reflects the region's maritime influence, featuring dishes like "cotriade," a traditional fish stew, and galettes, savory buckwheat pancakes.

The city is home to the École Nationale Supérieure des Télécommunications de Bretagne (ENST Bretagne), a prestigious engineering school specializing in telecommunications.

Lannion played a significant role in the French Revolution as a stronghold for the Chouan rebels, who opposed the Republican government.

The city center is characterized by charming cobblestone streets, half-timbered houses, and historic churches, including the 15th-century Église Saint-Jean-du-Baly.

Lannion is situated near the Côte de Granit Rose, a stunning stretch of pink granite coastline renowned for its natural beauty.

The Léguer River, which flows through Lannion, offers recreational opportunities such as kayaking, fishing, and hiking along its scenic banks.

Lannion is not home to any UNESCO World Heritage Sites.

The city's population has witnessed steady growth over the past decades, driven by economic development and its proximity to larger urban centers.

Lannion has made significant contributions to the telecommunications industry through its research and development centers and technology startups.