World Population 2025 Wikipedia Speedrun. Around 1804, the world population reached 1 billion people. As of 2025, population size has peaked in 63 countries and areas, including china, germany, japan and the russian federation, and the total population of this group is.

But after a period of very fast population growth, demographers expect the world population to peak by the end of this century. Around 1804, the world population reached 1 billion people.