Driven by the U.S. Census, provides great data on population, housing, demographics, and income.

The OECD provides data and reports on economic conditions all over the world.

Statista is awesome! It offers graphs and data on thousands of markets, industries, and demographics.

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

Provides authoritative and current data on demographics and economies of all countries.

U.S. government's complete geographical handbook. Country profiles track population, ethnicity and literacy rates, as well as political, geographical and economic data.

Each type of industry is assigned certain codes, called NAICS codes, which allow you to do research on a specific industry. For example, "grocery stores" are coded 445110; real estate agencies are coded 531210. You can use these codes to find financial information, forecasting, human resources-related issues, salaries, and more.