Nant-y-derry (Welsh: Nant-y-deri) is a village in the county of Monmouthshire, Wales, located six miles south east of Abergavenny and four miles northwest of Usk.
The River Usk flows close by and the area is a rural agricultural part of the county. The Foxhunter Inn, a local pub is named in honour of Harry Llewellyn's famous horse, Foxhunter.