All kinds of population statistics. The main component is tabulated population statistics: current, historical, estimates, projections, cities, agglomerations, etc. But also geopolitical data like the administrative divisions of countries (provinces, counties and such) of all nations of this world. In the resources section one can find a long list of national statistical agencies and other interesting resources.
The American Community Survey (ACS) is a nationwide survey conducted by the U.S. Census Bureau to provide communities with demographic, social, economic, and housing data every year. The California State Data Center generates reports and tabulations from data files released by the U.S. Census Bureau.
Saclink login required. RAND California is a subscription-based service related to California economic and public policy issues. It has four major components: CALIFORNIA STATISTICS contains information from more than 70 databases, ranging from industry employment to housing prices to SAT scores. Much of the data is available at the national, state, county, city, and zip code levels.