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US sees highest population growth in over 2 decades. What's the cause?

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The U.S. population grew by 3.3 million people this year , the highest increase in more than two decades .

International migration accounted for 84% of the population growth between 2023 and 2024 .

The South remained the fastest growing region, adding 1.8 million people more than all other regions combined.

The states with the highest birth rates this year were Texas , California and New York .