Mallwyd (Welsh pronunciationⓘ) is a small village at the most southern end of Gwynedd, Wales, in the Mawddwy community, in the valley of the River Dyfi.

The nearest villages are Dinas Mawddwy, two miles to the north, and Aberangell a similar distance to the south.

The village is near the boundary between the historic counties of Merioneth and Montgomeryshire, in the parish of Mallwyd in the district of Mawddwy.

The timber bell tower of the church is inscribed: SOLI DEO SACRUM ANNI CHRISTI MDCXL.

[7] The black marble, octagonal font, dated below the bowl 1734, was a gift of Sir John Mytton of Dinas Mawddwy.