Abergavenny is a market town in Monmouthshire, Wales.

It is 15 miles (24 km) west of Monmouth. Situated at the confluence of the small stream called the Gavenny with the River Usk, it is almost surrounded by lofty hills. The town was formerly walled, and contains the remains of a castle built soon after the Norman Conquest, frequently the scene of border strife. It is in the Welsh Marches.
A sign on the Town Hall gives Abergavenny the title 'Gateway to Wales' — this is thought to refer to the fought-after border running north-south through the town to other castles including Ewyas Harold and Usk. When formed, the county of Monmouthshire (referred historically as 'Wales and Monmouthshire') comprised a 'Welsh sector' to the west and English to the east. Today, as well as a local Monmouth accent, those from the nearby Welsh valleys, Herefordshire and the Forest of Dean can be heard in the town.