:Camddwr

{{Short description|River in Wales}}

{{Use dmy dates|date=April 2022}}

: For the tributary of the River Wye, see Camddwr, Wye and for the tributary of the River Teifi, see Camddwr, Teifi.

The Camddwr is a significant right-bank tributary of the River Towy in the eastern part of Ceredigion, mid Wales. It rises on the undulating plateau east of Garn Gron {{nowrap|({{coord|52.2253|-3.8247|type:landmark_region:GB|display=inline|name=Camddwr, source}})}} and flows in a generally south-southeasterly direction into Llyn Brianne, a reservoir formed by the damming of the upper Towy, {{nowrap|({{coord|52.1574|-3.7656|type:landmark_region:GB|display=inline|name=Camddwr, mouth}}).}}Ordnance Survey 1:25,000 scale Explorer map sheet 187 Llandovery A chapel at Soar y mynydd beside the river is often mentioned as being the most isolated in Wales.