Trefin (Welsh standardised:Tre-fin)[i], formerly anglicised as Trevine,[2][3][4][5] is a village in North Pembrokeshire, south-west Wales.

[9] The Archdruid Crwys, who was born in Craig Cefn Parc, Glamorganshire, had links to the village, with the historic mill at nearby Aberfelin being the subject of his poem Melin Trefin.

[11] From the 1800s, most of the village was rebuilt with a mix of early 1900s cottages and larger Victorian homes built for "sea captains".

The other main industry during this period alongside farming and shipping, were the mechanised slate quarries near the coast, expanded in the 1860s, with its resources exported from Porthgain's port.

[9] Nearby villages include Llanrhian, Abercastle, Porthgain, Mathry, Square and Compass, Penparc and Croesgoch.