According to new Census data, Washington D.C. is the most popular American city for millennials. The nation’s capital was followed by Denver, Portland, Houston, Austin, San Francisco, Seattle, Riverside, Dallas and Charlotte on the list of cities that contain the highest populations of “young people born between the 1980s and the end of the century.” Unsurprisingly, the list contains a few overlaps with this unofficial guide to top hipster cities (though, as we previously noted, most of those are cities you’ve probably never heard of) …