Llandegveth, also known by its Welsh name Llandegfedd, is a village in Monmouthshire, south east Wales. It is located between Cwmbran, in Torfaen, and Usk in rural Monmouthshire.

The parish church, dedicated to Saint Tegfedd, was once called Merthyr Tegfedd. It originates from the early Norman period, but was extensively restored in the 19th century. It has a fine example of a medieval, curved embanked churchyard.^[1][2]

Llandegfedd Reservoir, located nearby, is named after the village. It is famous for coarse fishing and holds record pike. It is also popular for open-water diving, sailing and waterskiing.^{[citation needed]}