Lamphey (Welsh: Llandyfái pronounced [ɬandəˈvaɪ]) is a village, a parish and a community near the south coast of Pembrokeshire, Wales, approximately 2 miles (3.2 km) east of the town of Pembroke, and 2 miles (3.2 km) north of the seaside village of Freshwater East. The 2011 census reported a population of 843.

Freshwater East is in the community as is the village of Hodgeston.

The village includes the ruins of the fourteenth-century Lamphey Bishop's Palace; a palace of the Bishop of St David's.

The parish church, dedicated to St Tyfai (or Tyfie) and St Faith, is medieval in origin but was largely rebuilt in 1869–1871 by the architect Ewan Christian. The fine tower is thirteenth or fourteenth century. In the chancel a piscina and two lancet windows date from the thirteenth century, but have been repositioned. The font is Norman.

Several Georgian-era buildings remain, including the guesthouse, Lower Lamphey Park on the Ridgeway. The village has two hotels/restaurants, The Dial public house, a primary school, a service station with a shop, a hairdressers, and a local bakery which has served the community for generations. There are playing fields. The village hall, with a capacity of 120 people, was completed in 2007.

Bishop Vaughan was responsible for adding the first-floor chapel on the north side of Lamphey Hall in the early 16th century. In 1542, Lamphey Manor was "surrendered to Henry VIII in exchange for the rich rectory of Carew".

The grade II listed Lamphey Court, a Georgian mansion, was built in 1823 to the west of the ruins of the Bishop's Palace. It was the seat of the Mathias family until it was sold in 1978 by Wing Commander Lewis Mathias, the High Sheriff of Pembrokeshire.

Lamphey, together with Cosheston, forms an electoral ward. The total ward population taken at the 2011 Census was 1,671.