Llanharry is a village, community and electoral ward in the county borough of Rhondda Cynon Taf, Wales. Historically part of Glamorgan, Llanharry has been inextricably linked with iron mining as far back as the Roman period, and for a period in the 20th century it boasted the only iron mine in Wales. The town is infamous for being the site of the murders of Harry and Megan Tooze, which remain some of Wales' most notorious unsolved murders.