Abergavenny Museum is a museum situated in the grounds of Abergavenny Castle, Abergavenny, Monmouthshire, south east Wales.
The museum is housed in the square 'keep' on the high point of the castle motte, in the hunting lodge built for the Marquess of Abergavenny in 1819 on the site. The castle grounds overlook the River Usk and Castle Meadows and is in Abergavenny town centre itself.