Mynydd Isa [ˌmənɨ̞ð ˈɪsa] is a village in Flintshire, in north-east Wales. It lies between the county town of Mold, and Buckley. Mynydd Isa was originally a small hamlet on the north side of the Mold to Buckley road (now the A549 road) just downhill from the now demolished Calvinist chapel.