Heartwood is wood nearer the pith of a stem or branch, different in colour from sapwood.

Heartwood may also refer to:

• Heartwood Forest, which, when complete, will be the largest new native forest in England
• Heartwood House, a Canadian charity
• Heartwood – The Southwest Virginia Artisan Gateway, a building in Virginia, United States
• Heartwood (film), a 1998 American film starring Jason Robards

• Amber Holly
• Amber Hood
• Amber House
• Amber Hunt (comics)
• Amberieu
• Amberieux-en-Dombes
• Amberite
• Amberjac
• Amber Jacobs
• Amber (Japanese singer)
• Amber: Journeys Beyond
• Amber (J-Pop)
• Amber K
• Amber Kalirai
• Amber Lake
• Amber Lee Ettenger
• Amber Lee Ettinger
• Amberleigh House
• Amberley Castle
• Amberley (disambiguation)
• Amberley, Ontario
• Amberley, Queensland
• Amberley railway station
• Amberley, Sussex
• Amberley, West Sussex