The Afan Forest Park is a 48-square-mile (120 km2) forest park in Britain. It is set in the Afan Valley in Neath Port Talbot, in south Wales. It is well known for its mountain biking and hiking or hillwalking trails. It is situated seven miles (11 km) from Junction 40 of the M4.

The River Afan is a river in Wales whose valley formed the territory of the medieval Lords of Afan. The Afan Valley encompasses the upper reaches of the river. The valley is traversed by the A4107 road. Settlements in the area include Cwmafan, Pontrhydyfen and Cymmer. The town of Aberavon, whose name in Welsh Aberafan means 'mouth of the Afan', grew up on the banks of the river and was later subsumed by the town of Port Talbot.