List of countries by population in 1940 this is population of countries in 1940 providing an approximate overview of the world population in World War II. Estimate numbers are from the beginning of the year, and exact population figures are for countries that were having a census in the year 1940Cite error: There are <ref>
tags on this page without content in them (see the help page). (which were on various dates in that year). | Britain 504,884,063
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China 246,124,171
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Soviet Union 190,772,915
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United States 148,153,637
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Germany 109,518,183
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Japan105,200,000