Blackdown or Black Down may refer to:

Places[edit]

Australia[edit]

• Blackdown, Queensland, a locality in the Central Highlands Region
• Blackdown Tableland National Park in Queensland.

Canada[edit]

• Blackdown Cadet Training Centre, a Canadian Cadet training centre (Tri-Force) located at CFB Borden, Ontario.

England[edit]

• Blackdown, Dorset, a village near Chard
• Black Down, Dorset, a hill near Portesham
• Blackdown, Hampshire, a village near Winchester
• Black Down, Somerset, a hill in the Mendip Hills
• Blackdown, Warwickshire, a village near Leamington Spa
• Blackdown, West Sussex, a hill also spelt Black Down
• Blackdown Hill, Dorset, one of Dorset's highest points
• Blackdown Hills National Landscape, protected area in Somerset and Devon
• Princess Royal Barracks, Deepcut (Blackdown Camp), a World War II army camp near Aldershot, Hampshire

Computing[edit]

• Blackdown Java, a port of Sun's Java virtual machine to Linux.

Popular culture[edit]

• "Blackdown", a song by Patrick Wolf from The Bachelor
• "Blackdown", a song by French artist Laurent Voulzy from Lys & Love