Treen (Cornish: Tredhin)[1] (grid reference SW3923) is a small village in the parish of St Levan, in the far west of Cornwall, England, United Kingdom.

[2] Treen overlooks the Penberth Valley and sits about 1 kilometre (0.62 mi) inland from Treryn Dinas, an Iron Age promontory fort, or cliff castle, with five lines of fortification.

[3] On the headland is the Logan Rock and to the west is Pedn Vounder tidal beach, which is popular with naturists.

The first records of the name is Tredyn (1304) and Trethyn (1314) and means farm + fort; being near the cliff castle at the Logan Rock.

[5]This village should not be confused with the hamlet of Treen, in Zennor parish on the north coast, above Gurnard's Head.