U.S. Census Bureau Fact Finder – Free demographics site. Here you can find detailed census data on any city, zip, or town, and survey data for areas with 65,000 people or more.
U.S. Census Bureau Quick Facts – This site provides fast, easy access to facts about population, business and geography for counties and some cities.
FEMA Flood Maps – The official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP).
Georgia Department of Natural Resources Flood Map Viewer – The viewer displays effective DFIRM floodzones for the entire state of Georgia.