Whether it's an oil boom or an influx of tech jobs, the populations of these 10 cities grew faster than in any other major metro area between July 2012 and July 2013, according to data from the Census Bureau.
A thriving university town with one of the best live music scenes in the country, Austin's youthful, creative vibe keeps people coming.
With it's more than 250 live music venues and festivals like its famed South by Southwest (or SXSW) Austin's "cultural vibrancy helps to drive the economy in a big way," said demographer Ryan Robinson.
Another driver: Jobs.
Austin's massive University of Texas, with its 50,000-plus enrollment, is known for its engineering and computer science programs, which have spawned many local tech businesses and incubators. It has also attracted a number of big tech companies -- Apple(AAPL), Google(GOOAV), Facebook(FB), Intel(INTC) -- looking to recruit young talent.
In January, the city's unemployment rate fell to 4.7%, the lowest of any metro area with a population of one million or more.
Source: Based on U.S. Census Bureau population data for July 1, 2012 through July 1, 2013. Rankings are based on largest percentage population growth in metro areas with a population of one million or more.
By Les Christie@CNNMoney - Last updated March 27 2014 12:25 AM ET