IIBarn S of Ael-y-Glyn Located by the side of the lane S of Ael-y-Glyn, immediately N of the electricity sub station at the NE boundary of Lower Harlech.
IIBryn Tirion Set against the hill slope at the junction between Pen Dref and a lane leading to Rehoboth chapel, in the centre of the town.
IICae Besi On a triangular site between Fford Newydd and Ffordd Isaf, within its own walled and revetted garden.
IICapel Rehoboth On a commanding, elevated site on the eastern edge of Harlech with fine views over the town and castle; set within its own walled graveyard and accessed via a steep lane leading up from the Stryd Fawr
IICow House S of Ael-y-Glyn Located by the side of the lane S of Ael-y-Glyn, immediately N of the electricity sub station at the NE boundary of Lower Harlech.
IICrown Lodge Set back from the road within its own grounds with commanding views across the Morfa.
IIField Barn S of Cae Du Located on an elevated site to the E of Harlech, some 150m S of Cae Du; sited gable into the slope and set back on the W side of the lane leading off from Pen Dref eastwards; within a characteristic d
IIMilestone On the NW side of the road SE of Y Lasynys Fawr, set against a low rubble wall.
IIParish Church of St Tanwg Located within its own churchyard set back on a bend in the town's main street (Stryd Fawr).
IIPencerrig Pellaf Located towards the southern boundary of the town, sited below the lane with commanding views across the Morfa; accessed via a short track from the lane and set behind low rubble forecourt walls.
IIPrimary House at Llam-y-Lleidr Located immediately below the Harlech road approximately 1.5km NE of the town, a short distance SW of Llam-y-Lleidr; built gable into the slope.
IIThe Plas On the street line, at the SW end of the main street.
IITy'r Felin Set back slightly from the lane behind a narrow garden.
IIY Lasynys Fawr including Brewhouse Block and Revettment Wall Located at the NE boundary of the community, set back some 250m from the road and sited against a rocky outcrop in the former flood plain; accessed from the road via an unmetalled track and set behind
IIY Wern Set back slightly above the road diagonally opposite Coleg Harlech.