Neath Port Talbot is a county borough and one of the unitary authority areas of Wales. Neath Port Talbot is the 8th most populous local authority area in Wales and the third most populous county borough.
The county borough borders the other principal areas of Bridgend and Rhondda Cynon Taff to the east, Powys and Carmarthenshire to the north and Swansea to the west. Its principal towns are Neath, Port Talbot and Pontardawe.
The first three maps are provided by A Vision of Britain through Time
These maps were found on Wikimedia Commons
These maps of Glamorgan post-1974 were found on another site and are very useful for sorting out the up-to-date geography of the area