According to the US Census Bureau, there were nearly 337 million people in the US as of July 2024, which is 4% of the world's population, which is just over 8 billion. 22% of our country’s population was 17 years old or younger. 36% were adults aged 18 to 44, 25% were 45 to 64 years old, and 18% of us were over 65. And I can say “us.”. More @Wikipedia
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