“Census Bureau Releases 2011 American Community Survey Estimates” (CB12-175, Sep. 19, 2012). The news release links to .zip compressed data (via ftp), the American Factfinder web site (where extractions can be done), and documentation, as well as three related reports: “Household Income for States: 2010 and 2011,” “Poverty: 2010 and 2011,” and “Health Insurance Coverage of Young Adults Aged 19 to 25: 2008, 2009, and 2011.”
www.census.gov/newsroom/releases/archives/american_community_survey_acs/cb12-175.html