Over half of Dartmoor National Park (57.3%) is private land; the Forest of Dartmoor being the major part of this, owned by the Duke of Cornwall. The Ministry of Defence owns 14% (see below), 3.8% is owned by water companies (see Dartmoor reservoirs), 3.7% by the National Trust, 1.8% by the Forestry Commission and 1.4% by Dartmoor's national park authority. About 37% of Dartmoor is common land.