Banwy is a community in northwest Montgomeryshire, Powys, Wales, named after the River Banwy and also called Banw in Welsh.

The community with the villages of Llangadfan and Foel, also called Garthbeibio. It is a sparsely populated area centred on the village of Llangadfan and extending west for some 10 km to the boundary with Gwynedd. It is located along the upper River Banwy valley, on either side of the A458 road between Llanfair Caereinion and Mallwyd.

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