Newcastle Emlyn Bridge is of uncertain date, probably 18th century. It was widened in the 19th century, but possibly includes some earlier work. Built of rubble stone, it has 3 elliptical arches, with a higher and broader central arch. There are full-height cutwaters on the east side, those on west side are covered by bridge widening. The west side has string courses over the arches, stepped over the central arch (but not continuing over the north arch). There are rubble parapets.

Reference: Cadw listed buildings database.