Social Explorer is an online research tool designed to provide quick and easy access to historical census data and demographic information. It creates maps and reports to help users visually analyze and understand demography and social change throughout history. Users can customize, save, share, print, and email maps and reports and export them to a variety of programs and statistical packages for further analysis and use in reports and presentations.
For further information and tutorials, visit the Social Explorer Guide.

Demographic and other statistics from the U.S. Census Bureau. Free U.S. Government Website.