The Afon Alaw (English: River Alaw) is a river on Anglesey (Welsh: Ynys Môn) which rises near Llanerch-y-medd and flows northwards into the reservoir of Llyn Alaw. Below the dam it then flows southwestwards to the island's west coast near Llanfachraeth. Its lower reaches, west of the A5025 road, are tidal.
- Ordnance Survey Landranger map sheet 114 Anglesey/Môn
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