List of countries by population in 1900
This is a list of countries by population in 1900, with colonial possessions being counted towards the ruling country's total.
Estimate numbers are from the beginning of the year and exact population figures are for countries that held a census on various dates in the year 1900.
List
| Rank | Country/Territory | Population estimate | Percentage of world population |
| — | World | 1,700,100,000 | 100% |
| 1 |  British Empirecollapsible list |
