St Illtyd is a village in Blaenau Gwent, Wales.
It is situated within the NP13 postcode district, which is within the Abertillery post town.
NP13 is the only postcode district within the Abertillery post town.
The Abertillery post town is within the Newport postcode area.
Administrative Ward: Llanhilleth
Administrative District: Blaenau Gwent
Country: Wales
UK Parliament: Blaenau Gwent