Tylwch is a village in Powys, Wales.
It is situated within the SY18 postcode district, which is within the Llanidloes post town.
SY18 is the only postcode district within the Llanidloes post town.
The Llanidloes post town is within the Shrewsbury postcode area.
Administrative Ward: Nantmel
Administrative District: Powys
Country: Wales
UK Parliament: Montgomeryshire