- Afon Cadnant
- Afon Cefni
- River Cegidog
- Afon Clarach
- River Cleddau
- River Clwyd
- River Clydach
- River Clywedog
- River Colwyn
- River Conwy
- River Cothi
- River Crafnant
- River Cynon
- River Cywyn
- Afon Ddu
- River Dee, Wales
- Afon Dulyn
- River Dwyryd
- River Dyfi
- Ebbw River
- Afon Eigiau
- River Ely
- River Elwy
- River Garw
- River Geirionydd
- River Glaslyn
- River Gwendraeth
- Afon Hepste
- River Lledr
- River Lliedi
- Afon Lloer
- River Lugg
- River Llugwy
- Afon Llwyd
- Afon Llyfni
- River Loughor
- River Machno
- River Mawddach
- River Mellte
- Afon Melynllyn
- River Monnow
- River Neath
- River Nevern
- River Ogmore
- River Ogwen
- Afon Porth-llwyd
- River Rhaeadr
- River Rheidol
- River Rhondda
- Rhymney River
- River Seiont
- River Severn
- River Sirhowy
- River Tâf
- River Taff
- River Tawe
- River Teifi
- River Teme
- River Trothy
- Afon Tryweryn
- River Towy
- River Usk
- River Vyrnwy
- River Wye
- River Ystwyth
