What is the population of Arizona? The U.S. Census Bureau provides population statistics. The actual census only takes place every ten years, in dates ending in a zero. In between, they often provide updated estimates.
The 2008 estimate for the population of Arizona was 6,500,180.
Population of Arizona, 2010
AZ Population Growth since 2000 census: 24.6%
Arizona ranks 16th in state population in the United States. It was 14th at the 2008 estimate, and 20th at the 2000 census.