Coetmor is a house in Bryn Goodman, Ruthin, Denbighshire, Wales. It is designated by Cadw as a Grade II listed building dated 1886. It was built for Col. Cornwallis-West and was designed by the Chester architect John Douglas. The house was originally named Elm Villa and later Coetmor, the surname of subsequent owners. It is one of a pair of houses, the other being Dedwyddfa, both isolated houses with large gardens, but well placed for access to the railway.