Newry River (Irish: An Rí; Ulster-Scots: Clanrye Wattèr^[1]), also known as the River Clanrye, is a river in Northern Ireland flowing through counties Down and Armagh. The river passes through the city of Newry and empties into Carlingford Lough near Warrenpoint.

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The river, which runs through Newry, forms the historic border between County Armagh and County Down. Some maps call the portion downstream from Newry to the Lough the 'Newry River' and the portion upstream of Newry the 'Clanrye' (as it curls around to its sources in the foothills of the Mourne Mountains), but not all sources make this distinction. According to local tradition, however, the entire waterway is known as the Clanrye River.

While the Newry River flows under the Newry Town Hall, according to the Ordnance Survey of Northern Ireland,^[2] the Clanrye breaks away from the Newry River near Drummillar. The Clanrye then progresses under the main A1 road at Sheepbridge and onward toward the Mayobridge Road at the Crown Bridges and Ashtree Cottages.

Beyond Newry, the river flows south east, past Narrow Water Castle, where it enters Carlingford Lough at Warrenpoint.^[3]

• List of rivers of Northern Ireland