POL 100: United States Government

There are any number of statistical websites available which will provide you with hard data and numbers regarding governmental programs, branches, and spending. 

Bureau of Economic Analysis
Promotes a better understanding of the U.S. economy by providing the most timely, relevant, and accurate economic accounts data in an objective and cost-effective manner

Bureau of Justice Statistics 
Publishes information on crime, criminal offenders, victims of crime, and the operation of justice systems at all levels of government

Bureau of Labor Statistics 
The principal fact-finding agency for the Federal Government in the broad field of labor economics and statistics

Bureau of Transportation Statistics
Administers data collection, analysis, and reporting to ensure the most cost-effective use of transportation-monitoring resources

Childstats.gov 
Provides a summary of national indicators of child well-being and monitors changes in these indicators over time

Division of Science Resources Statistics 
Quantitative information about domestic and international resources devoted to science, engineering, and technology

Economic Research Service 
Primary source of economic information and research in the U.S. Department of Agriculture

Energy Information Administration 
Independent and impartial energy statistics to promote public understanding of energy and its interaction with the economy and the environment

Environmental Protection Agency 
Environmental science, research, education and assessment statistics for the US

Federal Election Commission 
Campaign finance information and data on the public funding of Presidential elections

Federal Reserve System 
Banking and finance data from the Federal Reserve

IRS, Tax Statistics  
A wide range of tables, articles, and data that describe and measure elements of the U.S. tax system

National Agricultural Statistics Service 
Provides timely, accurate, and useful statistics in service to U.S. agriculture

National Center for Education Statistics
The primary federal entity for collecting and analyzing data related to education in the U.S. and other nations

National Center for Health Statistics 
From the CDC, the principal health statistics agency

National Center for Veterans Analysis and Statistics
Collects and analyzes data related to Veterans

National Criminal Justice Reference Service 
A federally funded resource offering justice and substance abuse information to support research, policy, and program development worldwide

Social Security Administration, Research, Statistics, & Policy Analysis
Source for retirement and disability research

Eurostat 
Statistical service for the European Union

FAOSTAT 
Provides time-series and cross sectional data relating to food and agriculture for some 200 countries

International Statistical Agencies 
Alphabetic listing from the US Census Bureau of statistical sites for various countries

American FactFinder 
US Census Bureau's site for population, housing, economic, and geographic data

The Statistical Abstract 
The authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States