Definitions: Population by child and adult categories. Data presented for through are Vintage population estimates. Each year the U.S. Census .
QuickFacts provides statistics for all states and counties, and for cities and towns with a population of 5, or more. -- Select a fact --, Population estimates, July.
The United States is the third most populous country in the world with an estimated population The American population almost quadrupled during the 20th century—at a growth Religious affiliations; Religions of American adults.