This is the source for population, housing, economic, and geographic data. In American FactFinder you can obtain data in the form of maps, tables, and reports from a variety of Census Bureau sources. From the Main Page find links to data in American FactFinder and other Census Bureau sites:
Users can find data and maps on the most popular topics for their areas like:
•    Fact Sheet for quick access to basic demographic, social and economic data on your city, town, county or state or ZIP Code.
•    People to find more popular tables on a variety of topics (age, education, income, race and more) for your area.
•    Housing to find popular tables on home values, ownership, housing characteristics and mortgage.
•    Business and Government for data on housing starts, government finances, foreign trade and more.
•    About the Data - Censuses and Surveys to learn more about how the Census Bureau organizes and presents data from many sources
•    Use the Help button at the top of each page to go to specific help for the page you are on, and for more information about the site.
•    Read the introduction to the main page of American Factfinder for basic background on using the site.
Users can also find their data set from all the data sets available in American FactFinder:
•    Data Sets - access to all data sets, tables, and maps available in American Factfinder
•    Maps - access to Reference and Thematic Maps with tips on creating, using, downloading and printing maps in AFF
•    Reference Shelf - resources, related sites and reports
•    Tools - links to data manipulation tools
•    Search box - here you can enter a keyword to find data, or enter the name of a geographic area, or click on 'enter a street address' to find data for your area.
It’s freely available information and no subscription is required.