Derbyshire is a county in the East Midlands of England. A substantial portion of the Peak District National Park lies within Derbyshire. The northern part of Derbyshire overlaps with the Pennines, a famous chain of hills and mountains. The county contains within its boundary of approx. 225 miles, part of the National Forest, and borders on Greater Manchester to the North West, West Yorkshire to the North, South Yorkshire to the North East, Nottinghamshire to the East, Leicestershire to the South East, Staffordshire to the West and South West and Cheshire also to the West. Derbyshire can make some claims to be at the centre of Britain: a farm near Coton in the Elms has been identified as the furthest from the sea, whilst Rodsley and Overseal were the centres of population during the twentieth century.
The city of Derby is now a unitary authority area, but remains part of the ceremonial county of Derbyshire. The non-metropolitan county contains 30 towns with between 10,000 and 100,000 inhabitants. There is a large amount of sparsely populated agricultural upland: 75% of the population live in 25% of the area.