U.S. Cities Profiles

http://www.city-data.com/
According to the about us page of this site "We've collected and analyzed data from numerous sources to create as complete and interesting profiles of all U.S. cities as we could. We have over 63,000 city photos not found anywhere else, graphs of latest real estate prices and sales trends, recent home sales, home value estimator, hundreds of thousands of maps, satellite photos, stats about residents (race, income, ancestries, education, employment...), geographical data, state profiles, crime data, registered sex offenders, cost of living, housing, businesses, local news links based on our exclusive technology, birthplaces of famous people, political contributions, city government finances and employment, weather, hospitals, schools, libraries, houses, airports, radio and TV stations, zip codes, area codes, air pollution, latest unemployment data, time zones, water systems and their health and monitoring violations, comparisons to averages, professionally written city guides, a forum and a social network with 420,000 registered members and 5,300,000 posts, 5,000+ user-submitted facts, 13,000+ exclusive local business profiles with photos, and more demographics. If you ever need to research any city for any reason, from considering a move there to just checking where somebody you know is staying, this is the site for you."