Heolgerrig is a village in Merthyr Tydfil, Wales.
It is situated within the CF48 postcode district, which is within the Merthyr Tydfil post town.
The full list of postcode districts within the Merthyr Tydfil post town is as follows:
The Merthyr Tydfil post town is within the Cardiff postcode area.
Administrative Ward: Cyfarthfa
Administrative District: Merthyr Tydfil
Country: Wales
UK Parliament: Merthyr Tydfil and Rhymney