Demographic Stats from CQPRESS"The decennial U.S. Census is an integral tool not only in providing the basis for legislative apportionment and redistricting, but perhaps more importantly to provide a fairly robust snapshot of people living in a certain locality at a specific time. Looking beyond population totals, users will find interesting data on age, income, race, ethnicity, and housing, among other demographics. When viewed across congressional districts, for example, these data can provide interesting insights into the redistricting process and the highly varied composition of districts. This data can provide even more opportunities for discovery when paired with the roll call data for the representatives that serve them. In U.S. Political Stats, demographic data is available at the congressional district level dating back to the 1980 U.S. Census."