Morlaix (French pronunciation: [mɔʁlɛ] ^ⓘ; Breton: Montroulez, pronounced [mɔ̃tˈʁuːles]) is a commune in the Finistère department of Brittany in northwestern France. It is a sub-prefecture of the department.

The Battle of Morlaix, part of the Hundred Years' War, was fought near the town on 30 September 1342 between the English under William de Bohun, Earl of Northampton and the French under Charles, Duke of Brittany. The result was an English victory and has been viewed by historians as presaging the battle tactics of the Battle of Crécy four years later.

The old quarter of the town has winding streets of cobbled stones and overhanging houses constructed of stone and timber. Many have religious and secular sculptures on their façades.

One of these houses is "la Maison dite de la duchesse Anne", or the "so-called Duchess Anne’s house", which is now a museum, open to the public. This house is said to be one of the oldest in the town. Local legend has it that it derives its name from the fact that the Duchesse Anne of Brittany visited the house during her Tro Breizh pilgrimage. This seems unlikely, though, as construction on the house started in the 1520s and Anne of Brittany died in 1514.

The Museum of the Jacobins in Morlaix, housed in a former convent, traces the history of Finistère.

Morlaix is a popular location for sea sports enthusiasts with a diverse array of activities on offer including surfing, sand buggying and kite flying. Visitors can also find beautiful coastal paths for walks. Inland activities include bowling, golf, horse-riding and many more. There are also a cinema and a swimming pool.

A tidal river that almost completely dries out at low tide reaches the town of Morlaix where there is a lock into a marina.

The municipality launched a linguistic plan concerning the Breton language through Ya d'ar brezhoneg on 27 June 2008.