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Austin, Texas, suburban counties lead in population growth

Four out of Austin’s five counties expanded by over 3.4% last year
By Israel Linares
CoStar Analytics
March 27, 2025 | 2:17 P.M.

Williamson and Hays counties ranked in the top 10 fastest-growing counties in the U.S., each growing by 3.7% between mid-2023 and mid-2024, among counties with at least 250,000 residents, according to the U.S. Census Bureau.

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