Loctudy is a fishing port and seaside resort in Brittany, France, at the mouth of the Pont-l'Abbé river estuary.
The commune of Loctudy is in the arrondissement of Quimper, department of Finistère. Situated in the peninsula of Penmarc'h in the far south-western part of Lower Brittany, it preserves elements of old Breton culture, and the Breton language is still in use.
The name means "place or hermitage of St Tudy". There is controversy concerning the identity of the saint: both Tudy of Landevennec and Tudwal have been suggested. The eleventh century church is dedicated to St Tudy.