Need Demographic Data?

City Data has over 74,000 city photos, 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, cost of living, housing, religions, businesses information.
CIA Factbook is another great tool for finding demographic data around the world. 
Scribble Maps is a cool way to draw and make notations on maps.