For those who really want to dig into the Census data (or many of their other surveys such as the Current Population Study), this is the starting point. Downloading software from the Census Bureau is required.
Social Explorer provides access to current and historical census data and demographic information. Create maps and reports to better illustrate, analyze and understand demography and social change.
Key content in Social Explorer includes: over 40 billion data elements, 200,000 variables; 18,000 interactive maps; the entire US Census from 1790 to the present as it is available; annual updates from the American Community Survey; InfoGroup data on religious congregations; Religious Congregations and Membership Study; and Carbon Emissions Data. Users can create custom maps, download data, and export, save, and print maps and reports.