Hafodunos Hall (Welsh: Plasty Hafodunos) is a Gothic revival house located near the village of Llangernyw in Conwy.

The present Hafodunos Hall was built between 1861 and 1866 for Henry Robertson Sandbach, whose father, the enslaver Samuel Sandbach, purchased the estate in 1830. When the British government abolished slavery in 1833, it compensated Henry for the loss of more than 2,400 enslaved people in British Guiana, while those who had been enslaved received nothing.