Blackwater River may refer to:

• West Road River, also known as the Blackwater River, in British Columbia, Canada
• Blackwater River (Ontario) in Canada
• Blackwater River, New Zealand in the South Island of New Zealand

In the United States:

• Blackwater River (Florida)
• Blackwater River (Maine)
• Blackwater River (Maryland)
• Blackwater River (Massachusetts-New Hampshire)
• Blackwater River (Missouri)
• Blackwater River (Contoocook River), a tributary of the Contoocook River in New Hampshire
• In Virginia:
  • Blackwater River (Virginia), a tributary of the Chowan River in southeast Virginia
  • Blackwater River (Southwest Virginia) in Franklin County, Virginia
• Blackwater River (West Virginia)

River Blackwater may refer to:

• River Blackwater, Essex, or its estuary, in Essex, England
• River Blackwater (River Loddon), in Hampshire, England (a tributary of the River Loddon in the north-east of the county)
• River Blackwater (River Test), in Hampshire, England (a tributary of the River Test in the south-west of the county)
• River Blackwater, North Scotland, north of Inverness, Scotland
• River Blackwater, Central Scotland, near Blairgowrie, Scotland
• Any of three rivers in Ireland:
  • Meath Blackwater
  • Munster Blackwater
  • River Blackwater, Northern Ireland

See also

• Blackwater river, a classification of river, with waters colored like black tea to coffee

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