Llechwedd Du is a subsidiary summit of White Esgeiriau in north Wales. The white peaks of the south ridge, and the higher summit of Moel y Blackstone.
The summit is located on the western edge of the plateau, and is marked by a few stones. Moel y Cerrig Duon, Foel y Geifr range and the Berwyn range, to the south is Gwaun Lydan and to the west is Aran Fawddwy and Foel Hafod-mountain. The plateau is crossed by a road at Bwlch y Groes, the pass between Llechwedd Du and Moel y Cerrig Duon.
Llechwedd Dudu is a UK listed Nuttall.