The key facts at the top give the total public debt outstanding on the latest day the Treasury reports, and the table lists the last 10 days with data, newest first.

The two parts of the debt

The Treasury splits the total into two parts. Debt held by the public is federal debt held by entities outside the U.S. government. Intragovernmental holdings are federal debt held by the U.S. government itself, in its own accounts.

When it updates

The Treasury reports the debt daily in its Debt to the Penny data, which has a row only for business days. This page reads that data every few hours and updates at the same address.