2000 Decennial Census. By U.S. Government. Public Domain.
It can be difficult to find consumer information (for example, which age group purchases the most yogurt?), and the databases below are your best bets.
Statista aggregates statistics and studies from market researchers, organizations, specialist publications, and government sources.
The U.S. government collects the most comprehensive data about the American people (all households are surveyed every 10 years for the Census, and a sampling is taken every 5 years for the American Community Survey). Most government information is available for free, but CU pays for some of the resources below that have enhanced features.