Blackheath may refer to:

• Blackheath, London, England
  • Blackheath (Lewisham ward), an electoral ward for the Lewisham London Borough Council
  • Blackheath railway station
  • Hundred of Blackheath, Kent, an ancient hundred in the north west of the county of Kent, England
• Blackheath, Surrey, England
  • Hundred of Blackheath, Surrey
  • Blackheath SSSI, Surrey, a biological Site of Special Scientific Interest
• Blackheath, West Midlands, England

• Blackheath, New South Wales, Australia
• Black Heath, Virginia, USA, a late 18th and 19th century plantation and coal mine
• Blackheath, an industrial quarter of Cape Town, South Africa
• Blackheath, Gauteng, in Johannesburg, South Africa

• Blackheath College (disambiguation)
• Blackheath High School, Blackheath Village in London, England
• Blackheath Proprietary School, a former school in Greenwich, London, England

• Blackheath Rugby Club
• Blackheath Common, Waverley, England
• Blackheath Beds, a fossiliferous stratigraphic unit in England
• Plantman, a comic book character also called Blackheath