Government Sources by Subject: Income

International

World Development Indicators
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This resource contains development data covering more than 575 indicators, 225 countries, and 18 regional and income groups. The data is compiled by the by the World Bank from officially-recognized international sources and includes income and poverty indicators.
2005-current available online.
1997-current (incomplete) available on CD-ROM.

Household Income and Expenditure Statistics (ILO)
This database from the International Labour Organization provides data by country for various income statistics.

Income, U.S. Census Bureau
Reports and statistics concerning income from the U.S. Census Bureau.
Tax Statistics, Internal Revenue Service
Tables, articles, and data that describe and measure elements of the U.S. tax system.

Distribution of Income, Wealth, and Taxes Across Washington Households
Income data from 2005-2009 is contained in this PDF from the Washington State Office of Financial Management.
Employment and Payrolls in Washington State by County and by Industry
1946-2001 (no.237). Quarterly reports on wages at the state and county levels. Print only.
Median Household Income Estimates by County, Washington State Office of Financial Management
Estimates by county in current dollars; 1989 to 2011 and a projection for 2012.

Image courtesy of the U.S. Department of Treasury.

Measuring Worth: calculators, graphs, data sets, and more.