American FactFinder: "source for population, housing, economic, and geographic information."
Catalog of U.S. Government Publications: "the finding tool for federal publications that includes descriptive records for historical and current publications and provides direct links to those that are available online."
Census Bureau: information on population, houscing, economic and geographic information.
GPO Access: "provides publishing and dissemination services for the official and authentic government publications to Congress, Federal agencies, Federal depository libraries, and the American public."
Statistical Abstract of the United States: " published from1878-2011, is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States."
The 48th Edition Kansas Statistical Abstract: The 48th Edition of the Kansas Statistical Abstract (KSA) contains data collected through July 2014 for sixteen categories of information: Agriculture; Banking and Finance; Business, Industry, and Exports; Climate; Communications and Information; Courts, Crime, and Public Safety; Education; Employment and Earnings; Energy and Natural Resources; Government; Housing and Construction; Income; Parks and Recreation; Population; Transportation; and Vital Statistics and Health.
USA.gov: provides access to the U.S. Government's Official Website
World Factbook: "provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities."