Here’s a cool new map website over at the National Aeronautics and Space Aerospace (NASA) that creates population projections of any area you like. Here is Minnesota with its surrounding area, but the cool thing is that you can draw a polygon around any part of the map and it will estimate the population within.
Here’s the map with a few samples:
[Two polygons showing parts of Minnesota.]
Play around with it and comment here if you find anything interesting to share!