Birmingham is a city and metropolitan borough in the West Midlands of England, United Kingdom. It is the most populous British city outside London with 1,092,330 residents (2013 est.),[1] and its population increase of 88,400 residents between the 2001 and 2011 censuses was greater than that of any other British local authority.[3] The city lies within the West Midlands Built-up Area, the third most populous built-up area in the United Kingdom