United States of America Population Pyramid 1975
United States of America in 1975
In 1975, the United States of America had a total population of 219,129,301 people. That is 12.0% more than in 1965, when the population stood at 195,653,774. The median age was 28.7 years, and for every 100 people of working age (15–64) there were 39.0 children under 15 and 15.9 people aged 65 or over. The pyramid is stationary: cohort sizes are roughly even through the younger ages, reflecting fertility close to replacement level and slow population change.
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.
Data source: United Nations World Population Prospects, 2024 revision (medium variant) — last updated July 2024.





