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

The commune is in the Finistère in northwestern France. Situated on the peninsula of Penmarc'h in the far southwestern part of Lower Brittany, it preserves elements of old Breton culture, and the Breton language is still in use.