Pandy, Monmouthshire is a hamlet in Monmouthshire, south east Wales, United Kingdom.
Pandy is located five miles north of Abergavenny on the A465 road to Hereford immediately to the north of Llanfihangel Crucorney. The Wales-England border is one mile to the north with the Offa's Dyke Path and Marches Way passing through the village.
The village of Pandy is spread out from the Pandy watermill at Allt-yr-Ynys to the north to the edge of the village of Lanfihangel Crucorney to the south. The fulling-mill at Pandy served the Llanover estate in the 17th century producing wool which was turned into Welsh flannel. Pandy is the Welsh word for a fulling-mill
The village was on a route used by the early railways, with the Abergavenny to Hereford line still passing to the west. There was at one time the Grosmont tramroad as well, now demolished. Raymond Williams was born in a cottage next to Offa's Dyke where his father was a railway signalman on the Hereford to Abergavenny railway line.
The village was redeveloped in the Victorian era by a pioneering lady architect, Bernadette Rocher who, in the 1870s, extended and reworked many of the older properties in local red sandstone. She is buried at the parish church at Oldcastle, Monmouthshire, a short distance to the northwest.