Brithdir is a village in Caerphilly county borough, Wales.
It is situated within the NP24 postcode district, which is within the New Tredegar post town.
NP24 is the only postcode district within the New Tredegar post town.
The New Tredegar post town is within the Newport postcode area.
Administrative Ward: New Tredegar
Administrative District: Caerphilly
Country: Wales
UK Parliament: Merthyr Tydfil and Rhymney