United States of America Population Pyramid 2009

United States of America
2009
Population: 308,023,454

Year

-5 -1   2009  +1 +5

Country

A B C D E F G H I J K L M N O P Q R S T U V W Y Z
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United States of America in 2009

In 2009, the United States of America had a total population of 308,023,454 people. That is 10.5% more than in 1999, when the population stood at 278,785,484. Half of the population was younger than 36.7 years; 19.8% were children under 15 and 12.7% were 65 or older. This is a stationary pyramid — similar numbers in each age group up to the older cohorts, the signature of near-replacement fertility.

The bulge of cohorts born between 1946 and 1964 — the post-war baby boom — is the defining feature of the United States pyramid, visible as it moves up the age scale over the decades.

Share of the population by age group, 1950–2100

Data source: United Nations World Population Prospects, 2024 revision (medium variant) — last updated July 2024.


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