Find data from the World Bank member countries, including coverage of World Development Indicators from 1960 to the present. A good source for GDP data.

Economic data from the Federal Reserve Bank of St. Louis

Provides a selection of data sources that small business owners can use for market research (very similar to this page of links, except for business owners instead of college students).

The American Economic Association provides links to a number of data sources in three categories: U.S. macroeconomic data, other U.S. data, and world and non-U.S. data

Statistics from the Organisation for Co-Operation and Development (OECD). Click on the "Development" link located on the left-side navigation for relevant data points.

Find data collected and provided by the UN and its suborganizations.

An individual-level population database. IPUMS provides census and survey data from around the world integrated across time and space. IPUMS integration and documentation makes it easy to study change, conduct comparative research, merge information across data types, and analyze individuals within family and community contexts. Data and services available free of charge. From the American Community Survey. A good source for gender and race data.

The American Community Survey (ACS) is an ongoing survey that provides vital information on a yearly basis. A source for detailed population and housing information about the United States. This survey gathers information such as ancestry, citizenship, educational attainment, income, language proficiency, migration, disability, employment, and housing characteristics.

The human development data are sourced from international data agencies with the mandate, resources, and expertise to collect national data on specific indicators unless otherwise noted.
The data are presented in two sections of the website:
‘Data’ page – provides downloads of over 150 global indicators and composite indices for over 190 countries in CSV and PDF. This page also provides documentation and methodologies, FAQ’s, API access, and other key information.
‘Country profiles’ page – presents HDI values and ranks, data visualizations/trends for the HDI and other composite indices, country explanatory notes, and over 150 other indicators.
Datasets include definitions of indicators and sources for original data components at the end of each table, with full source details in the Statistical references.

Among other things, the ICPSR "maintains a data archive of more than 500,000 files of research in the social sciences. It hosts 16 specialized collections of data in education, aging, criminal justice, substance abuse, terrorism, and other fields." In many cases the files contain raw data that require a statistical tool for use.

A website from the U.S. General Services Administration providing datasets, information, and tools from the federal government.

Find statistics and data about the federal government, state and local governments, along with information about the Census and maps of the U.S. showing demographic, environmental, agricultural, and weather information.

Find state-level data related to the GDP here. From the About page: "BEA's economists produce some of the world's most closely watched statistics, including U.S. gross domestic product, better known as GDP. We do state and local numbers, too, plus foreign trade and investment stats and industry data."

This key government statistical resource collects and provides data about labor economics and statistics.

Find data, maps, and visualizations from the U.S. Census.

This monthly publication from the Council of Economic Advisers for the Joint Economic Committee provides economic information on gross domestic product, income, employment, production, business activity, prices, money, credit, security markets, Federal finance, and international statistics. (description provided by the source) This is a great place to find U.S. economic data by month.

Violent crime includes murder, rape and sexual assault, robbery, and assault. Information about murder is obtained on a yearly basis from the FBI’s Uniform Crime Reports. There are two measures for nonfatal violence—the Uniform Crime Reports (UCR) and the National Crime Victimization Survey (NCVS). The NCVS measures rape or sexual assault, robbery, and aggravated and simple assault.

The National Center for Education Statistics (NCES) is the primary federal entity for collecting and analyzing data related to education in the U.S. and other nations. Includes data on public and private schools and colleges.

The FBI's Crime Data Explorer (CDE) provides data on crime and law enforcement. Use the CDE to discover available data through visualizations, download data in .csv format, and other large data files.

The Federal Reserve's archive of historical statistical publications. Data available back to 1914 (for some sets), in searchable PDF files.

Builds upon FRED and offers uncorrected historical economic data. Use ALFRED to grab snapshots of data as it was released to economists and policymakers.

This publication from 1975 "includes more than 12,500 time series, mostly annual, providing a statistical history of U.S. social, economic, political, and geographic development during periods from 1610 to 1970."