Trégastel (Breton: Tregastell) is a commune in the Côtes-d'Armor department of the region of Brittany in northwestern France.
Trégastel is situated between Perros-Guirec and Pleumeur-Bodou. Lannion, is 10 kilometres away.
Inhabitants of Trégastel are called trégastellois in French.
The municipality launched a linguistic plan through Ya d'ar brezhoneg on February, 2008.
In 2008, 16.5% of primary school children attended bilingual schools.
These are the official sister cities of Trégastel:
Foz, Spain, since 2003
Koussané, Mali, since 2004
St Laurent Church in the bourg
Ste Anne des rochers chapel
St Golgon chapel
The Costaérès castle
In 1892, Bruno Abakanowicz bought a small island called Costaérès in Trégastel where until 1896 he erected a neo-Gothic manor.
Marine aquarium of Trégastel
Since 1967, Trégastel has been home to a marine aquarium, built within a large, naturally occurring, outcrop of pink granite rocks.