Phoenix is the sixth most populous city in the United States according to the 2010 United States Census, with a population of 1,445,632, making it the most populous state capital in the United States. Phoenix’s ranking as the sixth most populous city was a drop from the number five position it had held since the U. S. Census Bureau released population estimates on June 28, 2007. Those statistics used data from 2006, which showed Phoenix’s population at 1,512,986, which put it just ahead of Philadelphia. In 2016, Phoenix regained the position of 5th most populous city, with the census bureau estimating its population at 1,615,017, edging out Philadelphia with a population of 1,567,872.