Demographic information is something that we in the U.S. are very good at collecting. The national census every ten years collects enough data about citizens to keep analysts busy until the next one comes along. Much of the data is in the public record, and Zipskinny.com has put together a website to help us digest and understand it. See how your zip code stacks up against the neighbors, or try out some other interesting comparisons. Since they are in close proximity, I found the comparison of Compton CA (90222) to Beverly Hills (90210) pretty interesting.