The top 10 most populated state capitals as of 2015 are Phoenix, Austin, Indianapolis, Columbus, Denver, Boston, Nashville, Oklahoma City, Sacramento and Atlanta. The top 5 most populated capitals are larger than the capital of the United States, Washington D.C. Phoenix, Arizona has a population of 1,513,000 and is the 6th largest city in the U.S, based on data from the U.S. Census.
Phoenix was founded in 1889 and according to legend received its name from Darrell Duppa, who believed a new city would rise from the prehistoric ruins of Hohokam. The city is located at 1,117 feet above sea level in the Sonoran Desert and is part of Maricopa County. Phoenix has an average yearly temperature of 75.05 degrees Fahrenheit and an average yearly rainfall of 8.04 inches.
As of 2015, no state capital other than Phoenix has a population above 1 million people. The second largest, Texas' capital of Austin, has a population of 885,000. The oldest city among the top 10 most populous capitals is Boston, Massachusetts, which was founded in 1630. The youngest among the top 10 is Oklahoma City, which was founded in 1910 and has a population of 610,000 as of 2015.
Other state capitals with large populations include Raleigh, Honolulu, Saint Paul and Lincoln, all which have a population of more than 250,000.