The Ebbw River (/ˈɛbuː/; Welsh: Afon Ebwy) is a river in South Wales which gives its name to the town of Ebbw Vale. The Ebbw River is joined by the Ebbw Fach River (Welsh: Afon Ebwy Fach; meaning 'little Ebbw river') at Aberbeeg. The Ebbw Fach is itself fed by a left-bank tributary, the River Tyleri.

The tributary Sirhowy River joins on the right bank at Crosskeys, then the river continues flowing south east, through the town of Risca, then through the western suburbs of Newport, alongside Tredegar Park. The tidal Ebbw joins with the estuarine River Usk seaward of Newport, before flowing into the Mouth of the Severn.^[1][2]

In common with the nearby Sirhowy River and Rhymney River the correct English name for the river is "Ebbw River", not the more usual "River Ebbw".^{[citation needed]}