Data and interactive thematic maps from the U.S. Census from 1790-present.
Provides access to current and historical United States census data, including all historic decennial censuses and American Community Surveys, as well as other demographic information, such as religious organizations. Census data is current to 2010 and historical back to 1790. In addition to being a data resource, the web interface lets users create maps and reports to better illustrate, analyze and understand demography and social change.
Population and Demographic Information from California
The below links provide access to population and demograpic information from a variety of state agency sources.