Wenallt is the name of several locations in Wales.
Villages Wenallt, a hamlet in the community of Trawsgoed, Ceredigion, Pen-y-wenallt, a hamlet near Cenarth in Ceredigion
Hills and mountains Gallt y Wenallt, a subsidiary summit of Y Lliwedd in Snowdonia Wenallt Hill, in Cardiff
Other uses Wenallt Camp, an Iron Age enclosure in Cardiff Wenallt Formation, a geological formation near Garth in Powys