Phoenix has a population of slightly fewer than 1.5 million people, or roughly one-sixth of the population of the state of Arizona. The Phoenix metropolitan area is roughly 1336 sq. km/516 sq. mi, with a population density of 2,798 persons per square mile.
Phoenix is the most populous capital city in the United States, and typically enjoys annual growth of four percent. It is the sixth largest city in the country by population.