Foxley Wood is a nature reserve in Foxley, Norfolk, England, the largest ancient woodland and coppice in Norfolk. The Norfolk Wildlife Trust, which manages this reserve, bought it in 1998. It is 123 hectares in size. It is a Site of Special Scientific Interest, a Nature Conservation Review site, Grade 2, and a National Nature Reserve.

Foxley Wood is 25 kilometres (16 mi) north-west of Norwich, 2 kilometres (1.2 mi) away from the Fakenham road (the A1067), near Honeypot Wood.

The nature reserve is currently the largest ancient woodland and coppice in Norfolk. The woodland is recorded in Domesday Book and parts of it are known to be over 6,000 years old. For the past 1,000 years, it was a source of wood (including hazel), but demand decreased in the 20th century.Because of the drop in demand, Foxley Wood became neglected. In the 1990s it was privately owned and managed by the Forestry Commission,and was acquired by the Norfolk Wildlife Trust in 1998.

It is open to the public every day except Thursday