4. Seattle, Wash.
jeff bezos kindle fire
Who launched here?: Amazon, Microsoft, Zillow
Average entrepreneur age: 34.9
Average work hours per day: 8.9

For years, Microsoft was considered Seattle's crown jewel, a position that was only amplified by the return of Steve Jobs to Apple in 1997, upping the competitive ante between the two tech giants. A strong tech history and close proximity to Silicon Valley make Seattle a great place to network and establish roots. Seattle and the Valley share quite a bit in common, including people: 41% of Seattle entrepreneurs once worked in Silicon Valley, the most overlap out of any region in Startup Genome's study.

  @FortuneMagazine - Last updated November 27 2012 10:17 AM ET
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