As of December 2024, Japan held United States treasury securities totaling about 1.06 trillion U.S. dollars. Foreign holders of United States treasury debt According to the Federal Reserve and U.S. Department of the Treasury, foreign countries held a total of 8.5 trillion U.S. dollars in U.S. treasury securities as of December 2024. Of the total held by foreign countries, Japan and Mainland China held the greatest portions, with China holding 759 billion U.S. dollars in U.S. securities. The U.S. public debt In 2023, the United States had a total public national debt of 33.2 trillion U.S. dollars, an amount that has been rising steadily, particularly since 2008. In 2023, the total interest expense on debt held by the public of the United States reached 678 billion U.S. dollars, while 197 billion U.S. dollars in interest expense were intra governmental debt holdings. Total outlays of the U.S. government were 6.1 trillion U.S. dollars in 2023. By 2029, spending is projected to reach 8.3 trillion U.S. dollars.