1. Boulder, Colo.
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Boulder is the most-educated U.S. metropolitan area, and it’s no surprise. The city is home to the main campus of the University of Colorado, which has nearly 30,000 on-campus degree-seeking students and more than 1,000 tenured or tenure-seeking faculty members. Add the city’s host of scientific institutes, like the Geological Society of America and the Space Science Institute, and it’s clear how this city of 300,000 has accumulated so many well-educated residents.