The U.S. Census Bureau announced on Mar. 26 that population growth slowed in the majority of the nation’s 3,143 counties and the District of Columbia between July 1, 2024, and July 1, 2025, according to its Vintage 2025 population estimates.
This trend is significant as it shows a shift in how populations are changing across the country, affecting local economies and planning efforts. Slower growth or declines can influence everything from infrastructure needs to political representation.
Among the counties that grew between 2023 and 2024, nearly eight out of ten saw their growth slow or reverse direction in the following year. The slowdown was also evident in metropolitan areas: out of all metro areas nationwide, more than three-quarters experienced slower growth compared to previous years. Notably, Laredo (Texas), Yuma (Arizona), and El Centro (California) had some of the steepest drops in population growth rates along the U.S.-Mexico border.
A key factor behind these changes was a nationwide decline in net international migration (NIM). Nine out of ten counties reported lower levels of international migration compared to previous years. George M. Hayward, a Census Bureau demographer, said: “The nation’s largest counties like those in the New York metro area are often international migration hubs, gaining large numbers of international migrants and losing people that move to other parts of the country via domestic migration. With fewer gains from international migration, these types of counties saw their population growth diminish or even turn into loss.”
Despite overall slowing trends nationally, many fast-growing counties were located along the Southeast coast—particularly Florida, Georgia, South Carolina, North Carolina and Virginia—with most rapid increases found on metro area edges or among southern states’ larger communities.
Metro areas as a whole continued to grow faster than smaller micro areas or rural regions but still at about half their prior pace; much of this change resulted from reduced NIM rather than shifts in natural increase or domestic migration patterns.
Looking ahead, new data with demographic details such as age and race will be released by June for further analysis. The Census Bureau noted that each annual release revises past estimates back to the last decennial census.
