Updated to December 2012, the newest release of Social Security Congressional Statistics just became available online at http://www.ssa.gov/policy/docs/factsheets/cong_stats/2012/index.html.
These annual fact sheets present data on the Social Security and Supplemental Security Income programs, including the number of people receiving benefits and the amount of total monthly payments made in the United States, in each state, and in each congressional district within the state. Information is also provided for the District of Columbia, American Samoa, Guam, the Northern Mariana Islands, Puerto Rico and the U.S. Virgin Islands.
For all locations, information is available in html, pdf and Excel formats.
North Dakota information is at http://www.ssa.gov/policy/docs/factsheets/cong_stats/2012/nd.pdf
Minnesota information is at http://www.ssa.gov/policy/docs/factsheets/cong_stats/2012/mn.pdf
South Dakota information is at http://www.ssa.gov/policy/docs/factsheets/cong_stats/2012/sd.pdf.
Current through December 2011, Social Security beneficiary information by state and individual county is at http://www.ssa.gov/policy/docs/statcomps/oasdi_sc/index.html. Note that OASDI stands for the three Social Security programs, Old-Age, Survivors, and Disability Insurance.
Also through December 2011, Supplemental Security Income (SSI) recipient information by state and county is at http://www.ssa.gov/policy/docs/statcomps/ssi_sc/2011/index.html.