Summary tables focusing on age, sex, households, families, and occupied housing units; general demographic profiles; and redistricting data for state legislature redistricting and congressional apportionment. The American Factfinder is a good place to start.
Easy-to-use tool for investigating U.S. demographic trends. Includes charts, maps, and ranking for national, state, metro, and county data from the 2000, 1990, and 1980 censuses (and sometimes earlier). Browsable from many data entry points.
Census information for national, state, and county levels. Tables include People Facts, Business Facts, and Geographical Facts (land area and density). People Facts include population estimates; racial, age, and gender breakouts; educational attainment; households; children under the poverty level; etc. Business Facts include retail sales, minority- and women-owned businesses, building permits, etc