Blackwater River
- Black Water (Conon)
- Blackwater (disambiguation)
- Blackwater Estuary
- Blackwater River (Buller River tributary)
- Blackwater River (Contoocook River tributary)
- Blackwater River (Florida)
- Blackwater River (Little Grey River tributary)
- Blackwater River (Maine)
- Blackwater River (Maryland)
- Blackwater River (Massachusetts–New Hampshire)
- Blackwater River (Missouri)
- Blackwater River (Perdido River tributary)
- Blackwater River (River Axe)
- Blackwater River (Tasman)
- Blackwater River (Virginia)
- Blackwater River (West Virginia)
- Enfield Blackwater
- Kells Blackwater
- Kerry Blackwater
- Kilkenny Blackwater
- Little Blackwater River (Maryland)
- Munster Blackwater
- River Blackwater (Northern Ireland)
- River Blackwater (River Loddon)
- River Blackwater (River Test)
- River Blackwater, County Cavan
- River Blackwater, Essex
- River Shannon
- West Road River