Hopkinstown (Welsh: Trehopcyn) is a small village to the west of Pontypridd town centre in the county borough (principal area) of Rhondda Cynon Taf, Wales situated alongside the banks of the River Rhondda. Hopkinstown is a former coal mining industrial community and is a district in the town of Pontypridd. It is neighboured by the settlements of Pwllgwaun, Trehafod and Pantygraigwen, and also comprises the subdistricts of Troed-Rhiw-Trwyn and Gyfeillion.
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