U.S. Census Bureau

Provides population, business, and geographic information for national, state, and county levels in the United States.

Provides: datasets from the U.S. Census 2000 for 50 states and the District of Columbia that are downloadable via FTP; technical documentation; and, record layout documentation for U.S. Census 2000 Summary Files 1 through 4, and Redistricting Data mandated by P.L. 94-171.