[3] Newcastle Emlyn Castle, was first mentioned in Brut y Tywysogion in 1215, when it was seized by Llewelyn the Great (Welsh: Llywelyn Fawr).

After a new parent firm, Unigate, decided to sell off its non-milk related dairies, it was bought by the Milk Marketing Board in 1979, but closed again in 1983.

[19] According to the United Kingdom census 2011 Newcastle Emlyn had a population of 1,883, including Adpar on the Ceredigion side of the River Teifi.

[20] The drop in Welsh usage in Newcastle Emlyn between 2001 and 2011 was among the biggest in Wales, though not uncommon across Ceredigion and Carmarthenshire.

Parents have the option of sending their children to a designated Welsh-medium secondary school, Ysgol Bro Teifi in Llandysul, Ceredigion.

The town's attractions include an art gallery, the Attic Theatre company and the National Woollen Museum.

A legend of the Wyvern of Newcastle Emlyn (Gwiber Castell Newydd Emlyn) tells how on a fair day when the town was full, a winged wyvern breathing fire and smoke landed on the castle walls, stared threateningly, then settled down to sleep.

A soldier waded the Teifi to a vantage point on the castle side and released a red cloak into the river.

The creature, suddenly woken, caught sight of the cloak, fell on it with shrieks and tore it to shreds, but was shot in its vulnerable underparts.

The dying wyvern turned over and floated down the river, its wound gushing venom that fouled the water and killed all the fish.