Talhenbont Hall is a Grade II listed building on a 100-acre (40 ha) estate in Gwynedd, Wales. Until it was renamed in the 19th or 20th century, the building was known as Plas Hen.

The Baronetcy of Ellis-Nanney of Gwynfryn and Cefndeuddwr was granted to Hugh Ellis-Nanney in 1898. The 1st baronet was a landowner with over 12,000 acres in North Wales, UK, most of which was inherited from his father, Owen Jones Ellis-Nanney. The family were political Conservative party members within the parliamentary constituency of Caernarfon, Wales.