The Census Bureau reports income from several major household surveys and programs. Each of these surveys differs from the others in some way, such as the length and detail of its questionnaire, the number of households included (sample size), and the methodology used to collect and process the data. See Guidance about Sources to see which survey meets your specific needs, and Income Data by Source to access data from specific surveys.
The Geographic Concentration of High-Income Households
Income, Poverty, and Health Insurance Coverage in the United States: 2011 (P60-243)
Household Income Inequality Within U.S. Counties: 2006-2010
Effect of Benefits and Taxes on Income and Poverty: 2009
Income, Earnings, and Poverty from the American Community Survey