Newcastle Emlyn is a town on the River Teifi, straddling the counties of Ceredigion and Carmarthenshire in West Wales. It is also a community entirely within Carmarthenshire, bordered by those of Llangeler and Cenarth, also in Carmarthenshire, and by Llandyfriog in Ceredigion. Adpar is the part of town on the Ceredigion side of the River Teifi. It was formerly called Trefhedyn and was an ancient Welshborough in its own right. The area including Adpar had a population of 1,883 according to the 2011 census.
In 1932, the former Co-operativecreamery was reopened by Dried Milk Products to make cheese. After new parent 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. Reopened latterly by Saputo, it now manufactures mozzarella cheese using locally sourced dairy produce and is the town's largest employer.
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. A 2017 population estimate put it at 1,888, of whom 52 per cent were female and 48 per cent male, with 379 aged 0–17 years, 979 aged 18–64, and 530 aged over 65. The 2001 UK census had 69 per cent of the 950 people then living in Newcastle Emlyn speaking fluent Welsh, although the proportion fell in the next decade to 54 per cent, as the town population increased to 1,138 aged 3 or over by 2011. 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. The latest Estyn inspection report in 2012 on the town's English-medium secondary school notes that only 12 per cent of pupils came from homes where Welsh is spoken, with 31 per cent considered fluent in the language. Parents have the option of sending their children to a designated Welsh-medium secondary school, Ysgol Dyffryn Teifi in Llandysul, Ceredigion. Only 64.8 per cent of the town's residents were born in Wales. The town has a dual-language primary school, and also a pre-school establishment known as Meithrinfa Teifi Tots Nursery.
A legend of the Wyvern of Newcastle 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. The general terror gave way to an effort by a few townsfolk to destroy it. A soldier waded the Teifi to a vantage point on the castle side and released a red cloakinto 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 assailant escaped to safety. The dying wyvern turned over and floated down the river, its wound gushing venom that fouled the water and killed all the fish. There was joy at the monster's death.
