Places

• Blackdown, Dorset
  Blackdown, Dorset
  Blackdown is a small village in the West Dorset district of Dorset, England; situated west of Beaminster. The local travel links are located from the village to Crewkerne railway station and to Exeter International Airport. The main road through the village is the B3165, connecting Blackdown to...
  
  , a village near Chard
  Chard, Somerset
  Chard is a town and civil parish in the Somerset county of England. It lies on the A30 road near the Devon border, south west of Yeovil. The parish has a population of approximately 12,000 and, at an elevation of , it is the southernmost and highest town in Somerset...
  
  
• Blackdown, Hampshire, a village near Winchester
  Winchester
  Winchester is a historic cathedral city and former capital city of England. It is the county town of Hampshire, in South East England. The city lies at the heart of the wider City of Winchester, a local government district, and is located at the western end of the South Downs, along the course of...
  
  
• Blackdown, West Sussex, a hill also spelt Black Down
• Blackdown, Warwickshire
  Blackdown, Warwickshire
  Blackdown is a village and civil parish in the Warwick district of Warwickshire, England. According to the 2001 census it had a population of 128...
  
  , a village near Leamington Spa
• Blackdown Hills
  Blackdown Hills
  The Blackdown Hills are a range of hills along the Somerset-Devon border in south-western England, which were designated an Area of Outstanding Natural Beauty in 1991....
  
  , a range of hills in Somerset and Devon
• Blackdown Camp, a World War II army camp near Aldershot
  Aldershot
  Aldershot is a town in the English county of Hampshire, located on heathland about southwest of London. The town is administered by Rushmoor Borough Council...
  
  , Hampshire
• Black Down, Somerset
  Black Down, Somerset
  Black Down is the highest hill in the Mendip Hills, Somerset, in south-western England. Black Down lies just a few miles eastward of the Bristol Channel at Weston-super-Mare, and provides a view over the Chew Valley...
  
  , a hill in the Mendip Hills

• Blackdown Tableland National Park
  Blackdown Tableland National Park
  Blackdown Tableland is a national park in Central Queensland , 576 km northwest of Brisbane. The mountainous terrain of the tablelands provides a unique landscape featuring gorges, waterfalls and diverse vegetation....
  
   in Queensland.

• Blackdown Cadet Training Centre
  Blackdown Cadet Training Centre
  The Blackdown Army Cadet Summer Training Centre is a training centre formerly known as the Army Cadet Summer Training Center Blackdown for Royal Canadian Army Cadets, and, since 2003, included the Royal Canadian Air Cadets, and Royal Canadian Sea Cadets...
  
  , a Canadian army training centre located at CFB Borden, Ontario.

In computing

• Blackdown Java
  Blackdown Java
  Blackdown Java was a Linux port of Sun Microsystems's Java virtual machine, developed by a group of volunteers led by Karl Asha and Juergen Kreileder. It predated Sun's official Linux port, and supported Linux on architectures that the official version did not, including SPARC and PowerPC...
  
  , a port of Sun's Java virtual machine to Linux.