Statistics provide the numbers with which to understand the demographics of your community & to support an argument. You may want to start by searching the Department of City Planning site for a community profile. You can then find more detailed information about your community by searching American Factfinder by zip code. A source like ProQuest Statistical Abstract will provide you with national numbers that can help to provide a larger context. All of these sites and the others listed below have many features. Play around and ask a librarian if you need any help.