World Population over Time

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Historical Estimates of World Population

(Population in millions. When lower and upper estimates are the same they are shown under "Lower.")

Year	Summary		Biraben	Durand		Haub	McEvedy and Jones	Thomlinson		UN, 1973		UN, 1999	USCB
	Lower	Upper		Lower	Upper			Lower	Upper	Lower	Upper
10000 BC	1	10					4	1	10
8000 BC	5					5
6500 BC	5	10								5	10
5000 BC	5	20					5	5	20
4000 BC	7						7
3000 BC	14						14
2000 BC	27						27
1000 BC	50						50
500 BC	100						100
400 BC	162		162
200 BC	150	231	231				150
1 AD	170	400	255	270	330	300	170	200		200	400	300
200 AD	190	256	256				190
400 AD	190	206	206				190
500 AD	190	206	206				190
600 AD	200	206	206				200
700 AD	207	210	207				210
800 AD	220	224	224				220
900 AD	226	240	226				240
1000 AD	254	345	254	275	345		265					310
1100 AD	301	320	301				320
1200 AD	360	450	400			450	360
1250 AD	400	416	416									400
1300 AD	360	432	432				360	400
1340 AD	443		443
1400 AD	350	374	374				350
1500 AD	425	540	460	440	540		425					500
1600 AD	545	579	579				545
1650 AD	470	545				500	545	500		470	545
1700 AD	600	679	679				610	600
1750 AD	629	961	770	735	805	795	720	700		629	961	790
1800 AD	813	1,125	954				900	900		813	1,125	980
1850 AD	1,128	1,402	1,241			1,265	1,200	1,200		1,128	1,402	1,260
1900 AD	1,550	1,762	1,633	1,650	1,710	1,656	1,625	1,600		1,550	1,762	1,650
1910 AD	1,750											1,750
1920 AD	1,860											1,860
1930 AD	2,070											2,070
1940 AD	2,300											2,300
1950 AD	2,400	2,556	2,527			2,516	2,500	2,400		2,486		2,520	2,556

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, 1999, The World at Six Billion, Table 1, "World Population From"
Year 0 to Stabilization, p. 5,
http://www.un.org/esa/population/publications/sixbillion/sixbilpart... longdesc="This link to a non-federal Web site does not imply endorsement of any particular product, company, or content."
title="This link to a non-federal Web site does not imply endorsement of any particular product, company, or content."
alt="This link to a non-federal Web site does not imply endorsement of any particular product, company, or content." />

U.S. Census Bureau (USCB), 2008, "Total Midyear Population for the World: 1950-2050",
Data updated 12-15-2008,
http://www.census.gov/ipc/www/idb/worldpop.html

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Source: U.S. Census Bureau, Population Division
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