This seems to break down who owns what: https://www.thebalance.com/who-owns-the-u-s-national-debt-3306124 https://www.thebalance.com/who-owns-the-u-s-national-d

This seems to break down who owns what: https://www.thebalance.com/who-owns-the-u-s-national-debt-3306124 https://www.thebalance.com/who-owns-the-u-s-national-debt-33... The single largest holder of government debt is the Social Security Trust Fund.