Us Population By Age Group 2024. As of 2024, the population of united states is projected at 345.43 million, compared to 343.48 million in 2023. Shows estimates of current usa population overall and people by us state/county and of world population overall, by country and most populated countries.

It is the most populous country in north america, and the. Here’s how the united states’s total population breaks down by age group: