A blackwater river is a river with a deep, slow-moving channel flowing through forested swamps or wetlands.

Blackwater River may also refer to:

• West Road River (also Blackwater River), a major tributary of the Fraser River

• Blackwater River (River Axe), a tributary of the River Axe in Devon and Dorset
• River Blackwater, Essex
  • Blackwater Estuary
• River Blackwater (River Loddon), a tributary of the Loddon forming boundaries of Hampshire with Surrey and Berkshire
• River Blackwater (River Test), a tributary of the Test in Wiltshire and Hampshire

• Black Water (Conon), in Wester Ross, Scotland

• Blackwater River, a distributary of the River Shannon
• Enfield Blackwater, flowing from Staplestown, County Kildare, to the River Boyne in County Meath
• Kells Blackwater also known as Leinster Blackwater, flowing from Lough Ramor, County Cavan, to Navan, County Meath
• Kerry Blackwater, a river in County Kerry
• Kilkenny Blackwater, a tributary of the River Suir in County Kilkenny
• Munster Blackwater, a river which flows through Counties Kerry, Cork, and Waterford
• River Blackwater, County Cavan
• Ulster Blackwater in Counties Armagh, Tyrone and Monaghan

• Blackwater River (Tasman), a tributary to the Mangles River
• Blackwater River (Buller River tributary)
• Blackwater River (Little Grey River tributary)

• Blackwater River (Alabama), a river in Baldwin County
• Blackwater River (Florida), a river arising in southern Alabama and flowing through the Florida Panhandle to the Gulf of Mexico
• Blackwater River (Maine), a river in Aroostook County
• Blackwater River (Maryland), a largely saltwater river in Dorchester County
  • Little Blackwater River (Maryland), a tributary
• Blackwater River (Massachusetts–New Hampshire), a tidal inlet in northeastern Massachusetts and southeastern New Hampshire
• Blackwater River (Missouri), a tributary of the Lamine River
• Blackwater River (Contoocook River tributary), a river in central New Hampshire
• Blackwater River (Virginia), a river in southeastern Virginia
• Blackwater River (West Virginia), a river in the Allegheny Mountains (with a tributary named Little Blackwater River)

• Blackwater (disambiguation)

Topics referred to by the same term

This disambiguation page lists articles about distinct geographical locations with the same name.
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