Llanwnda is a rural village and parish[1] to the north of the Welsh county of Pembrokeshire and part of the community of Pencaer.

[2] The hamlet of Trefasser, according to topographer Samuel Lewis, was stated to be the birthplace of Asser, the biographer of the 9th-century king of Wessex, Alfred the Great.

[2] To the north of the village is the rocky outcrop of Garnwnda, which was the site of a French soldiers' camp during the Battle of Fishguard in 1797.

[1] The parish church of St Gwyndaf, situated in a walled churchyard, has mediaeval origins and was extensively restored in the 19th century.

[9] Llanwnda came to a degree of national prominence in the summer of 2007 following the purchase of a semi-derelict farmhouse (Trehilyn) by the broadcaster Griff Rhys Jones and the ensuing BBC television documentary, A Pembrokeshire Farm, which recorded its restoration.