The Congressional Directory is the official directory of the U.S. Congress, prepared by the Joint Committee on Printing (JCP). 1995 (104th Congress) to present available online on FDSys. Provides congressional district maps for each state and some statistical information on votes cast in each state by district and by party, as well as cumulative data on number of representatives by state under each apportionment.

In addition to the voting data by major parties this project provided data "for population and housing characteristics, including total population by household, group quarters, institutions, age group, gender, marital status, race, nationality, and urban and rural residency. Additional demographic variables describe the congressional districts in terms of education, income, employment status and occupation, veteran status, births, deaths, and marriages." Data are available only to users at ICPSR member institutions.

OASDI and SSI fact sheets for each state and Congressional district.

This site is by E. Scott Adler, Professor of Political Science at the University of Colorado, Boulder, offers a data set that includes a wide range of economic, social, and geographic information for every U.S. congressional district, from 1943-1998.

Farm and crop data for each congressional district along with producer demographic information.

Federal government site that provides "the total dollar amount of award transactions in each state and territory, as well as total transaction amounts by contracts, grants, loans, and other financial assistance." Includes data by congressional districts.