The world population increased by more than 71 million people in 2024 and will be 8.09 billion people on New Year's Day, according to U.S. Census Bureau estimates released Monday. The 0.9% increase in 2024 was a slight slowdown from 2023,when the world population grew by 75 million people. In January 2025, 4.2 births and 2.0 deaths were expected worldwide every second, according to the estimates.