About three-quarters of U.S. metropolitan areas added to their populations between July 2014 and July 2015, according to the U.S. Census Bureau. In total, the number of people living in metro areas grew by 2.5 million during those 12 months, to 275.3 million.
These five metro areas added the most residents:
Find out the rest of the cities in the top 20 and how much they all grew.
Los Angeles is still the most-populous county, with 10.2 million residents. And Texas is the fastest-growing state.
Check out the Census Bureau's latest population estimates for all of the details.