20. Naples-Immokalee-Marco Island, FL
> Population growth (2010-2015): 10.73%
> Total population: 357,305
> Per capita income: $73,869
> Unemployment rate: 4.8%

Located in southwest Florida, the Naples metro area’s population rose by 10.7% over the last five years. The area’s unusually high growth rate is likely due to its status as a retirement destination, as a generation of baby boomers began to migrate warmer climates. Nearly 30% of the area’s population is at least 65 years and old, more than double the national proportion.

19. Fort Collins, CO
> Population growth (2010-2015): 11.00%
> Total population: 333,577
> Per capita income: $43,584
> Unemployment rate: 2.8%

People tend to move to areas with greater job opportunities. Job prospects may have contributed to the Fort Collins area’s 11% population growth since 2010, the vast majority of which was due to people moving to the area. The area’s unemployment rate of just 2.8% — the fourth lowest of any U.S. metropolitan area — is indicative of a healthy labor market.

18. Bend-Redmond, OR
> Population growth (2010-2015): 11.04%
> Total population: 175,268
> Per capita income: $41,675
> Unemployment rate: 5.7%

Bend, Oregon’s population increased by over 11% in the last five years. In many ways, however, the city does not fit the profile of a rapidly growing metropolitan area. Job opportunities tend to attract potential workers to an area, but Bend’s unemployment rate of 5.7% is higher than jobless rate in the majority of metropolitan areas.