Dolforwyn Castle () is a Welsh medieval castle above the village of Abermule, Powys. The fortification was established by Llywelyn ap Gruffydd, Prince of Gwynedd in the late 13th century. It is sited on a wooded ridge commanding excellent views of the upper Severn Valley. Dolforwyn Castle is a fine example of Welsh castle design as opposed to those built by the English during their conquests of Wales.