More than 29,300 people settled last year in the county between Tampa and Orlando. Almost all of the growth in Polk County — 88% — was from people moving from another area of the United States, rather than abroad.
Despite receiving new residents from abroad as births exceeded deaths, some of the country's most populous counties were also among those that lost the most residents as they moved to other parts of the U.S. The most marked effect was in Los Angeles County, with 56,000 fewer inhabitants.