“The United States Census Bureau (officially Bureau of the Census as defined in Title 13 U.S.C. § 11) is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data. As part of the United States Department of Commerce, the Census Bureau serves as a leading source of data about America’s people and economy.”
From Wikipedia: http://en.wikipedia.org/wiki/US_Census_Bureau
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U.S. Census Bureau Home
http://www.census.gov/
Population, population change and estimated components of population change: April 1, 2000 to July 1, 2009 (NST-EST2009-alldata) AND Population change: April 1, 2000 to July 1, 2009 (NST-EST2009-popchg2000-2009)
http://www.census.gov/popest/national/national.html
Projections
The Population Projections Program produces projections of the United States resident population by age, sex, race, and Hispanic origin. The 2009 National Projections are a supplemental series to the 2008 National Projections released on August 14, 2008, and provide results for differing assumptions of net international migration. All other methodology and assumptions, including mortality and fertility, are the same as those used in the 2008 National Population Projections. The 2009 series are useful for analyzing potential outcomes of different levels of net international migration.
http://www.census.gov/population/www/projections/2009projections.html
Housing Topics
Housing Fact Sheets, American Housing Survey , Census 2000, Homeownership, Housing Affordability , Housing Vacancy, Market Absorption of Apartments, Historical Tables from the Housing Censuses
http://www.census.gov/hhes/www/housing.html
Income
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.
http://www.census.gov/hhes/www/income/data/historical/index.html
Health Reform Trends, Research and Analysis 