Census - 1950 to 2050 (InfoPlease.com)
Provides historical and projected population of the world, as well as growth rates for each ten year period.
World Population (Census.gov)
Provides a population clock.
World Population - Ancient to 1950 (U.S. Census Bureau)
Provides estimates of world population from 10,000 B.C. to 1950 A.D. Estimates place the population of 12,000 year ago at between one and ten million people. At 8,500 years ago the maximum number of people was still estimated to be ten million. For 6500 years or more the population of the earth may have been stable.
"By 1500 A.D. the estimated population of the earth was 500 million. By 1800, 300 years later, the population had doubled to about a billion people. By 1930, 130 years later, it doubled again to 2 billion people. By 1975, 45 years later, world population doubled again to 4 billion. It is estimated to take until 2025, 50 years later, to attain another doubling of world population to 8 billion."
Editor's Note: Current world water, food, and fossil fuel supplies cannot sustain the last projected doubling of population.
World Population Births and Deaths (U.S. Census Bureau)
Provides the estimated number of births, deaths, and increase in population per year, month, day, hour, minute, and second.
World Population Change (U.S. Census Bureau)
Provides a chart showing estimated change in total world population from 1950 to 2050. Shows a high of over 85 million more people per year around 1990 to less than 40 million more people per year by 2050.
World Population Growth Rate (U.S. Census Bureau)
Provides a chart showing estimated growth rate of world population from 1950 to 2050. Shows a high of over 2 percent in the 1960's to less than one-half percent by 2050.
World Population Growth Since 1 A.D. (DESIP.IGC.org)
Shows maps of population growth.
World Population Projection 1950 - 2050 (U.S. Census Bureau)
Provides a chart showing estimated total world population from 1950 to 2050.
World Population for the Past Year (U.S. Census Bureau)
Provides the number of persons estimated to be in the world, month by month, over the past year.