Phoenix had about 1,475,834 people in 2005. It is the fifth-largest city in the United States in the 2000 census. Phoenix is a very large city. It has an area of 515 square miles. This makes it the 10th largest city by area. As of 2006, the Phoenix Metropolitan Statistical Area (MSA) was the 13th-largest in the United States, with an estimated 4,039,182 people.