Bletchley is a constituent town of Milton Keynes, a city in Buckinghamshire, England. It gives its name to a larger census "built-up area" that occupies the south-west of the city and which is divided by the West Coast Main Line railway between the civil parishes of Bletchley & Fenny Stratford and West Bletchley, together with a fragment of Stoke Hammond CP. At the 2021 census, the population of t…