The town was founded by the Norman William FitzMartin in about 1197. He was a son-in-law of the Lord Rhys, who nevertheless expelled him from his former base at nearby Nevern, which had been established by his father Robert fitz Martin. William founded Newport as the new capital of the Marcher Lordship of Cemais and it was a busy port founded primarily on the growing medieval wool trade. Despite seizure from the native Welsh, it remained within the FitzMartin family until the death of William, the 2nd Lord Martin, who died without a male heir in 1326. Newport Castle, built by FitzMartin, is situated on a spur of Carn Ingli which overlooks Newport and much of the surrounding countryside. Though in ruins since at least the 17th century, it is impressive due to its situation; a house incorporating the castle walls, which faces west over the town, the bay and the Irish Sea, is still inhabited. In the town is a significant mediaeval pottery kiln from the 15th century, believed to be the only intact example in Britain; finds include jugs, pots, ridge tiles and distilling equipment. Excavation was funded by the Heritage Lottery Fund in 2017. Newport appears prominently on a 1578 parish map of Pembrokeshire, and is a former marcher borough. George Owen of Henllys, in 1603, described it as one of five Pembrokeshire boroughs overseen by a portreeve. It retains some of the borough customs such as electing a mayor, who beats the bounds on horseback every August. In the 1880s the castle was associated with John Brett, who rented it for his large family while he spent summers cruising the south and west coasts of Wales painting, sketching and photographing. He moored his 210-ton schooner, Viking at Parrog. A lifeboat station was operated from a beach known as The Cwm to the west of Parrog in the early 20th century.
Newport town has a compact but varied shopping centre with most facilities including a post office, a wide range of retail premises and ancient buildings including the castle, which is undergoing restoration work.
Parrog
The old port area contains much of historic interest, including some of the old quay walls and two former lime kilns. There are moorings for small craft and a number of holiday lets and eating places. It is possible, with caution, to cross the river on foot at low tide. Parrog has two beaches, a golf course, a windsurfing and dinghy sailing club, pubs, hotels and camping grounds.
The church of St Mary's, situated below the castle though within the town, dates from the FitzMartin era, and the outside east apse bears their arms. The church was the subject of an 1860 photograph by notable early Welsh photographer John Thomas. Other religious buildings include Bethlehem Chapel and the Tabernacle Chapel.
Hostelries
The town's hostelries include Llwyngwair Arms in the centre of town and Cnapan Hotel, a Georgian hotel and restaurant.
Sailing
Newport Sailing Club is housed in an old warehouse. As well as facilities for members, it has a non-members' bar.
