Birmingham is a major city and metropolitan borough in the West Midlands, England. It is the second-largest city and metropolitan area in England and the United Kingdom, with roughly 1.1 million inhabitants within the city area and 3.8 million inhabitants within the metropolitan area. Birmingham is commonly referred to as the second city of the United Kingdom.
Located in the West Midlands county and region in England, approximately 100 miles from Central London, Birmingham, as one of the United Kingdom's major cities, is considered to be the social, cultural, financial, and commercial centre of both the East and West Midlands. Distinctively, Birmingham only has small rivers flowing through it, mainly the River Tame and its tributaries River Rea and River Cole – one of the closest main rivers is the Severn, approximately 20 miles west of the city centre. Birmingham's urban area is the second-largest in the United Kingdom, with its most recently estimated population in 2017 being 2,897,303, and it also lies within the most populated English district.