The United States ranks third in population, following China and India. As of recent estimates, the U.S. population is about 331 million people, representing approximately 4% of the world's total population. This ranking reflects the country's diverse demographics, which include a variety of ethnicities, cultures, and languages. Factors contributing to its population growth include immigration and higher birth rates in certain regions. Population ranking is an important indicator for understanding social, economic, and political dynamics within the country and its position on the global stage.