River Dyfi

River Dyfi
River Dovey
The river viewed upstream
from the Jubilee Bridge near Mathafarn
Native nameAfon Dyfi (Welsh)
Location
CountryWales
Physical characteristics
SourceCreiglyn Dyfi
  elevation1,900 ft (580 m)
Mouth 
  location
Irish Sea
Length30 mi (48 km)

The River Dyfi (Welsh: Afon Dyfi; Welsh pronunciation: [ˈdəvi]), also known as the River Dovey (/ˈdʌvi/ DUH-vee), is an approximately 30-mile (48-kilometre) long river in Wales.

Its large estuary forms the boundary between the counties of Gwynedd and Ceredigion, and its lower reaches have historically been considered the border between North Wales and South Wales.