As a student of trends, I was excited to see  a fascinating interactive look at the migration of people from each county to every other county in 2008.  Where do Chicago people migrate to?  What areas send people to Chicago? More than 10 million Americans moved from one county to another in the USA during 2008. The map here visualizes those moves. Click on any county to see comings and goings: black lines indicate net inward movement, red lines net outward movement.