Hilston Park is a country house and estate between the villages of Newcastle and Skenfrith in Monmouthshire, Wales, close to the border with Herefordshire, England. The house and park are in the Monnow valley, beside the B4347 road, 7.9 miles (12.7 km) by road northwest of Monmouth and just over 1 mile (1.6 km) southwest of Skenfrith.