Tylwch is a small village in Powys, Wales.

Tylwch lies south of the principal town of Llanidloes on the border of Montgomeryshire and Radnorshire.

It lies on the Afon Dulas, which once serviced a local woolen mill.

Other early industries included West Fedw, a now disused lead mine.

Five people were seriously injured and a 24-year-old woman died in the incident.