5. San Francisco/Bay Area

Increase In Labor Pool, 2011-2016:  49.9 percent

Tech Jobs, 2016: 328,070

It has long been the center of IT activity in the U.S., since the area includes Silicon Valley. Salaries grew 13.8 percent, on average, from 2011 to 2016 to an average annual salary of $123,158, which is needed since housing costs are 1.5 times the national average. Meanwhile, the millennial population grew 9.5 percent from 2010 to 2015.