As of September 2014, foreigners owned $6.06 trillion of U.S. debt, or approximately 47% of the debt held by the public of $12.8 trillion and 34% of the total debt of $17.8 trillion. The largest holders were China, Japan, Belgium, the Caribbean banking centers, and oil exporters.
Who has the United States borrowed money from?
Treasury bonds are how the US – and all governments for that matter – borrow hard cash: they issue government securities, which other countries and institutions buy. So, the US national debt is owned mostly in the US – but the $5.4tn foreign-owned debt is owned predominantly by Asian economies.