Demographic and statistical data can be used in various ways when you analyzing a industry, such as to get an idea of the size and characteristics of a potential market, get background information on the economic situation of a country an industry operates in, show business possibilities (e.g. country economic forecasts), and assist in determining the potential risk of doing business in an industry or locality.

Passport
Market data as well as Consumer Lifestyle reports for many different countries available.

Economist Intelligence Unit: Country Data
Source of economic indicators and forecasts providing data series on economic structure, external debt service, external trade, trends in foreign trade, and quarterly indicators.  Click on Data Tool (next to Data Services) and select All CountryData in Step 1.

Economist Intelligence Unit: Market Indicators & Forecasts
Find data on industries, markets and demographics, at the country, region and aggregate level, with forecasts out to 2030. Also includes macroeconomic forecasts.  Click on Data Tool (next to Data Services) and select All Market Indicators & Forecasts in Step 1.

EMIS
Current country and company information from more than 500 sources for emerging markets in Asia, Latin America, Eastern Europe, and the Middle East-North Africa.

SourceOECD
Provides online access to the many statistical publications put out by the Organisation for Economic Co-operation and Development (OECD) and includes country studies, forecasting publications, reports on agriculture, developing economies, education, employment, energy, environment, migration, social issues, trade and sustainable development.

Freely available sources include:

Data.gov
Provides access to a full range of statistics and information produced by more than 70 agencies of the U.S. government.

International Statistics Database
Produced by the St. Louis Federal Reserve, provides a way to look for worldwide economic indicators. Links to individual indicators (such as GDP and Inflation) available for countries. Descriptions are searchable by title, country, subject, source and keyword.

Statistical Abstract of the United States
Provides statistics for the U.S. with selected data for regions, states, metropolitan areas, cities, and foreign countries.

See also:

World Bank Data

UNData

ILO Data