In 2006, the city added 162,000 people, but during the crisis the city only added around 77,000 people. Phoenix was the fastest growing city in the country for over a decade until the sub-prime mortgage crisis and the recession hit. A city heavily affected by the mortgage crisis The city is also one of the largest in physical size in the country, spanning over 1,300 square kilometers, twice the size of the city of Tucson. With just over 4.7 million people, Phoenix is the eleventh most populated metro area in the United States. This is part of the Valley of the Sun, which is also part of the larger Salt River Valley. The city of Phoenix is contained within the Phoenix metropolitan area. It is the fifth-most populated city in the country and is the state capital with the largest population and the only state capital that has over one million residents. It is the capital of Arizona and the most-populous city in the state. Phoenix is a city of 1.7 million people located in the state of Arizona in the southwestern United States.