Rees Hopkin Rhys (19 March 1819 - 1899) was an industrialist, landowner and prominent local government figure in the Aberdare area for much of the nineteenth century.Rhys was born in Llwydcoed and from an early age showed an interest in public affairs.
In 1847, he lost his sight after an accident at Dowlais works where he was conducting experiments with "gun cotton".