Pandy is a village in Monmouthshire, South East Wales, United Kingdom. The name Pandy is the Welsh word for a fulling-mill. The village is 5 miles (8 km) north of Abergavenny on the A465 road to Hereford. It ranges from the watermill at Allt-yr-Ynys, Walterstone, in the north to the northern edge of Llanfihangel Crucorney, in the south. The Wales–England border is one mile to the north. And the Offa's Dyke Path and Marches Way pass through the village. The River Honddu runs from north to south along the western stretch of the village, sandwiched between unclassified Longtown Road, and the Welsh Marches Railway Line and the A465. The Black Mountains rise up on the west of the village while the outlying Skirrid looms high over the village on the east.

English historian William Coxe documented in his 1801 Historical tour in Monmouthshire:

     'At the time of the Roman invafion Monmouthshire was part of the territory inhabited by the Silures, which, befides this diftrict, comprehended the counties of Glamorgan, Brecknock, Radnor, Hereford, and fuch parts of Gloucestershire, Worcefterfhire as lay between the Severn, the Teme, and the Towy.'

Coxe proposed that the capital of the Silures was Venta Silurum, Caerwent, and that their principal towns included Magna, which was near modern-day Kenchester in Herefordshire and Gobannium (Abergavenny). In 1877 English archaeologist William Thompson Watkin referred to a Roman camp 'overlooking the line of (the road from Magna to Gobannium).' He continued:

J. Geraint Jenkins observed in his book The Welsh wollen industry (1969) that 'the wide distribution of the word pandy in Welsh place-names, signifies the importance of fulling mills in the country.' Toponymists Owen and Morgan later documented in their 2008 Dictionary of the place-names of Wales that the name 'Pandy' in Monmouthshire was originally cited in 1814. They continued:

In contrast, British historian Joseph Bradney (1904-1933) referred to 'a fulling mill which once was turned by the Honddu.'

Bradney described Pandy as 'a long straggling village which has sprung up over recent years.' Socialist writer and academic Raymond Williams famously fictionalized it in his famous novel Border Country as Glynmawr ('big or large valley'): 'To a stranger Glynmawr would seem not a village, but just thinly populated farming country.' He later described Glynmawr as 'a remote village, in a very old settled countryside, on the border between England and Wales'.

In the 1870s Pandy was redeveloped by Bernadette Rocher, a pioneering architect, who extended and reworked many of the older properties in local red sandstone. The current housing of the village is a mix of Victorian-era cottages, farms and villas and some 1970s housing estates. One of the estates, 'Wern Gifford', is next to the east side of the A465 and adjacent to the village hall.