Historical Estimates of World Population

(Population in millions.  When lower and upper estimates are the same they are shown
under "Lower.")
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                                           McEv-
                                             edy
       --Summary-- Bira- --Durand---         and Thomlinson- -UN, 1973--   UN,
Year   Lower Upper   ben Lower Upper  Haub Jones Lower Upper Lower Upper  1995  USBC
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-10000     1    10                             4     1    10
 -8000     5                             5
 -6500     5    10                                               5    10
 -5000     5    20                             5     5    20
 -4000     7                                   7
 -3000    14                                  14
 -2000    27                                  27
 -1000    50                                  50
  -500   100                                 100
  -400   162         162
  -200   150   231   231                     150
     1   170   400   255   270   330   300   170   200         200   400   300
   200   190   256   256                     190
   400   190   206   206                     190
   500   190   206   206                     190
   600   200   206   206                     200
   700   207   210   207                     210
   800   220   224   224                     220
   900   226   240   226                     240
  1000   254   345   254   275   345         265                           310
  1100   301   320   301                     320
  1200   360   450   400               450   360
  1250   400   416   416                                                   400
  1300   360   432   432                     360   400
  1340   443         443
  1400   350   374   374                     350
  1500   425   540   460   440   540         425                           500
  1600   545   579   579                     545
  1650   470   545                     500   545   500         470   545
  1700   600   679   679                     610   600
  1750   629   961   770   735   805   795   720   700         629   961   790
  1800   813 1,125   954                     900   900         813 1,125   980
  1850 1,128 1,402 1,241             1,265 1,200 1,200       1,128 1,402 1,260
  1900 1,550 1,762 1,633 1,650 1,710 1,656 1,625 1,600       1,550 1,762 1,650
  1910 1,750                                                             1,750
  1920 1,860                                                             1,860
  1930 2,070                                                             2,070
  1940 2,300                                                             2,300
  1950 2,400 2,556 2,527             2,516 2,500 2,400       2,486       2,520 2,556
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Sources:
Biraben, Jean-Noel, 1980, An Essay Concerning Mankind's Evolution,
     Population, Selected Papers, December, table 2.

Durand, John D., 1974, "Historical Estimates of World Population:
     An Evaluation,"  University of Pennsylvania, Population Center,
     Analytical and Technical Reports, Number 10, table 2.

Haub, Carl, 1995, "How Many People Have Ever Lived on Earth?" Population
     Today, February, p. 5.

McEvedy, Colin and Richard Jones, 1978, "Atlas of World Population
     History," Facts on File, New York, pp. 342-351.

Thomlinson, Ralph, 1975, "Demographic Problems, Controversy
     Over Population Control,"  Second Edition, Table 1.

United Nations (UN), 1973, The Determinants and Consequences of 
     Population Trends, Population Studies, No. 50., p.10.

United Nations, 1996, "World Population From Year 0 to Stabilization",
     gopher://gopher.undp.org:70/00/ungophers/popin/wdtrends/histor

U.S. Bureau of the Census (USBC), 1995, "Total Midyear Population for 
     the World:  1950-2050", Data updated 2-28-96, 
     http://www.census.gov/ipc/www/worldpop.html

Source:  http://www.census.gov/ipc/www/worldhis.html