This history of Milton Keynes details its development from the earliest human settlements, through the plans for a 'new city' for 250,000 people in northern Southeast England, its subsequent urban design and development, to the present day. Milton Keynes, founded in 1967, is the largest settlement and only city in Buckinghamshire. At the 2021 census, the population of its urban area was estimated to have exceeded 256,000.[1]