สหรัฐฯ: เมืองใหญ่ - Map Quiz Game

New York is the biggest city in the United States, but did not surpass one million until the 1880 census. Chicago surpassed the one million mark the following decade. By 2010, more than 50 American cities had over a million people. How many can you identify on this free map quiz game? Challenge yourself to get them all right on this interactive learning game.