OASDI Beneficiaries by State and Zip Codes, 2015
https://www.ssa.gov/policy/docs/statcomps/oasdi_zip/2015/oasdi_zip15.pdf
Information on the beneficiary population at the state and zip code level. Presents basic program data on the number and type of beneficiaries and the amount of benefits paid in each state and zip code. From the Social Security Administration