Social Security recognizes same-sex couples’ marriages in all states, and some non-marital legal relationships (such as some civil unions and domestic partnerships).
This is important in determining if you are entitled to certain Social Security and Medicare benefits, and to calculate payment amounts for Supplemental Security Income (SSI).
They also recognize same-sex marriages and some non-marital legal relationships established in foreign jurisdictions.
For more information, click on the link below.
https://www.ssa.gov/people/same-sexcouples/