The Lower Swansea valley (Welsh: Cwm Tawe Isaf) is the lower half of the valley of the River Tawe in south Wales. It runs from approximately the level of Clydach down to Swansea docks, where it opens into Swansea Bay and the Bristol Channel. This relatively small area was a focus of industrial innovation and invention during the Industrial Revolution, leading to a transformation of the landscape and a rapid rise in the population and economy of Swansea.
Today the area is in the final stages of regeneration. Modern Industrial units and housing has replaced the pollution of the metallurgical industry and the area is now the home of Championship football club Swansea City A.F.C. and Welsh Rugby Union region Ospreys. Railway lines which criss-crossed the valley have now been replaced by pleasant walking and cycling paths and the River Tawe now hosts canoeists instead of copper barges.