Michigan has seven of the smartest cities in the nation. That's according to a portfolio.com survey which ranks Ann Arbor and its 114,000 residents at number two in the nation in brainpower. The national business news website used U.S. Census Bureau data to analyze the levels of educational attainment in 200 metropolitan areas, ranging in size from New York City to Burlington, Vermont. Ann Arbor, the home of the University of Michigan, is second to Boulder, Colorado in the concentration of adults who attended college at 77.4% and the share who hold advanced degrees at 25.5%.