Andy Kiersz's article in the Business Insider (see Americans are Still Moving to the Suburbs) summarizes data from the US Census Bureau's American Community Survey (ACS) to conclude that "Americans still love the suburbs, and are still moving there from big cities."
This has long been and continues to be indicated in the data, even as major media rely on anecdotes are to suggest that large numbers of people are leaving the suburbs to "return" to the core cities (from which, by the way, most never moved). There is no doubt that the core cities are doing much better than before, and that is a good thing. Much of this is because the cities are safer than in the 1970s and 1980s. The historic urban core has been restored as an integral part of the modern urban area. However, promoting the health of core cities does not require demeaning or dismissing the suburbs, which are just as integral to modern urbanism as core cities.
Kiersz refers to a list of the 25 largest met migration movements between counties as reported by the ACS for 2007 to 2011. In every case, the 25 largest net domestic migration movements are from more highly urban core environments to more suburban environments (domestic migration is measured only at the county level).
The list shows that even within the nation's largest core city, New York, people are moving to more dispersed areas. This includes net migration from Manhattan to the Bronx and Brooklyn to Queens. Then there is the suburban movement, with a stream of migrants from Queens, in the city to adjacent, suburban Nassau County. Migration from Nassau County even further out, to Suffolk County also made the top 25.
The outward movement is not limited to New York. A net 50,000 people left the Los Angeles metropolitan area than arrived, just among the 25 largest county migration pairs. Most went to the Riverside-San Bernardino area (which depending on the definition can be called "exurban") and a large number to the Bakersfield metropolitan area. Within the metropolitan area, 10,000 moved from Los Angeles County to Orange County.
The city (also a county) of San Francisco, which has had the strongest growth of any fully developed major US municipality that has not annexed since 1950, lost 5,000 people to nearby suburban San Mateo County.
The top 25 also includes nearly 20,000 people moving from Chicago's core Cook County to three suburban counties.
It will probably be quite a long time, if ever, before the top 25 migration list has meaningful representation showing movement from suburban counties to core counties. Yet, today's more healthy cities will do better if they genuinely tackle their remaining challenges. Most important are their education systems that send a disproportionate share of young families to the suburbs. However, from the United States to Europe, Japan, and China, the natural order is that cities (metropolitan areas with their core cities, suburbs, and exurbs) tend to disperse as they add population. That reality is again confirmed by the new data.