Loctudy (French pronunciation: [lɔktydi]; Breton: Loktudi) is a fishing port and seaside resort in Brittany, France, at the mouth of the Pont-l'Abbé river estuary.

The port grew because of its sheltered position protected from the prevailing southwest winds.

The fishing port is important (2004-6: around 7000 tonnes per annum landed), and specializes in langoustines, called "demoiselles de Loctudy".

Loctudy is twinned with the towns of Fishguard in Pembrokeshire, Wales and Ribadeo in Galicia, Spain.

Irish cyclist, and yellow jersey holder of the three European Grand Tours, Shay Elliott, lived, and operated a hotel, here, for a period, with his Strasbourg-born wife, and son Pascal.