Ystalyfera is a village in Neath Port Talbot, Wales.
It is situated within the SA9 postcode district, which is within the Swansea post town.
The full list of postcode districts within the Swansea post town is as follows:
The Swansea post town is within the Swansea postcode area.
Administrative Ward: Ystalyfera
Administrative District: Neath Port Talbot
Country: Wales
UK Parliament: Neath