Population Size & Growth

Total population counts, growth rates, and future projections.

Fastest-Growing States in the U.S. 2026: Population, Migration, and Rankings

| Population Size & Growth |

Florida is the fastest-growing state in 2026 with a 2% year-over-year population increase, followed by Arizona and Texas. Over the 2020–2025 period, Idaho led with 10.4% growth, while the South accounted for nearly three-quarters of U.S. population gains. This article breaks down the latest Census Bureau estimates, rankings, and the migration and economic forces behind the trend.

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U.S. Population by State: 2025 Census Estimates Show Texas and Florida Lead Growth as California Slips

| Population Size & Growth |

The U.S. Census Bureau’s Vintage 2025 estimates show the national population grew by just 0.5% between July 2024 and July 2025, the slowest since the COVID-19 pandemic. California remains the most populous state at 39.36 million, but it lost residents, while Texas and Florida posted the largest numeric gains. The new state-level data highlight a continuing shift toward the South and Mountain West.

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