Carreg Coetan Arthur is a neolithic dolmen near Newport in North Pembrokeshire, Wales.
Carreg Coetan Arthur dates from around 3000 BC and is the remains of a Neolithic burial chamber (also known as a quoit).
The remains consist of a 4-metre-long capstone on smaller supporting rocks. It would have originally been earth covered, but this has eroded away.
The site is managed by Cadw and it is a scheduled ancient monument.
Coordinates: 52°1′6.9″N 4°49′41.6″W / 52.018583°N 4.828222°W