U.S. and World Population Clock

The U.S. and World Population Clock refers to tools and resources that provide real-time estimates of the current populations of the United States and the entire world. These clocks utilize statistical models and data from sources such as the U.S. Census Bureau, the United Nations, and other demographic research organizations to give live updates on population numbers. ### U.S. Population Clock - **Source**: Often maintained by the U.S. Census Bureau.