United States of America Population Pyramid 1955

United States of America
1955
Population: 166,200,024

Year

-5 -1   1955  +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 1955

The population of the United States of America in 1955 was 166,200,024. With a median age of 30.0 years, the United States of America had a youth dependency ratio of 47.7 and an old-age dependency ratio of 13.6 per 100 people of working age. The broad-based, expansive shape of the pyramid points to high fertility and strong population growth.

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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