Walter Hickey and Joe Weisenthal of Business Insider used Census data to determine that half the people in the United States live in these 146 shaded counties. Do you live in one of the blue areas? You can see a list of those counties on their original post.
The Afternoon Map is a semi-regular feature in which we post maps and infographics. In the afternoon. Semi-regularly. Thanks to Conrad Hackett of Pew Research for tweeting this one.