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UN Estimate of One Billion Population
- When
- 1804
- Where
- Global
The United Nations estimated that the world population reached one billion for the first time in 1804.
This estimate marks the first time the global human population is believed to have hit the one billion mark. It took approximately 300,000 years of human history to reach this level, contrasting with the rapid growth to 8 billion in the subsequent 218 years.
Sources
- World population Wikipedia, revision of 2026-09-12
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.