Common of nearly 1000 inhabitants (landeleausiens), Landeleau is located in the center of western Brittany, halfway between the south and north coasts of Finistère, on the edge of the Aulne, and between the Black Mountains and the Monts Arre.
Saint-Théleau (Telo in Breton) came from the sixth century of Wales, gives its name to the town, Lan meaning "place dedicated to a saint". His worship has remained very much alive as attested by the Pardon and Troménie followed every Sunday of Pentecost by many faithful.
