Phoenix is the capital, and largest city, of the state of Arizona. With 1,445,632 people (as of the 2010 U.S. Census), Phoenix is the most populous state capital in the United States, as well as the sixth most populous city nationwide.

The anchor of the Phoenix metropolitan area (also known as the Valley of the Sun, a part of the Salt River Valley), it is the 13th largest metro area by population in the United States, with approximately 4.3 million people in 2010. In addition, Phoenix is the county seat of Maricopa County and is one of the largest cities in the United States by land area (1,338.26 km2).