:River Tanat

{{Short description|River in northern Powys, Wales}}

{{Use dmy dates|date=January 2018}}

{{Use British English|date=January 2018}}

File:Afon Tanat near Llangedwyn - geograph.org.uk - 552226.jpg]]

River Tanat, also known as Afon Tanat, is a river in northern Powys, Wales. Its source is close to the Cyrniau Nod mountain, to the north of Lake Vyrnwy. The river flows in a generally east-south-east direction until it joins the River Vyrnwy near Llansantffraid-ym-Mechain. For a short distance prior to its confluence it flows within western Shropshire, England.{{cite map|publisher=Ordnance Survey|title=Wales Landranger|scale=1:50,000}}

Its tributaries include the Afon Eirth, Afon Rhaeadr, Afon Iwrch and Afon Goch, and they form part of the Tanat Valley.{{cite web|url=http://www.cpat.org.uk/projects/longer/histland/tanat/tnnatura.htm|title=The Natural Landscape|work=The Tanat Valley|publisher=The Clwyd-Powys Archaeological Trust|accessdate=5 May 2013}}