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The Ledger, Unrolled

U.S. public debt by holder — the public versus the government itself, 1997 to today

Unit
US$ (trillions)
Frequency
Monthly (month-end)
Coverage
1997–2026
Evidence Quality
High

U.S. federal debt from $5.4T to $39.5T as a streamgraph — total debt as the river's width, split into what markets hold and what the government owes itself.

U.S. Treasury Fiscal Data · Debt to the Penny

Total public debt outstanding, US$ trillions · band thickness is each holder's share

A streamgraph reads by thickness, not height: the full width of the river is total debt outstanding, and the two bands are who holds it — the public (markets, foreign and domestic) versus intragovernmental accounts (mainly the Social Security and other federal trust funds). The river widening from about $5.4T to $39.5T is the debt story; the public band widening faster than the intragovernmental one is the composition story.

01

Question

As U.S. federal debt went from single-digit to nearly forty trillion dollars, who ended up holding it?

02

Evidence

The river is total public debt outstanding; the two bands are its holders. In September 1997 the total was $5.4 trillion — $3.8T held by the public, $1.6T in intragovernmental accounts. By July 2026 it is $39.5 trillion: $31.8T public, $7.7T intragovernmental. Both bands grow, but the public band grows faster — from about 70% of the total to roughly 80% — so a rising share of the debt is owed to markets rather than to the government's own trust funds.

03

Observation

Read the band thickness and how the mix shifts, not the wiggle.

Read thickness, not vertical position: a streamgraph has no fixed baseline, so the total width of the river at any date is the debt, and each band's width is that holder's amount. The bands always sum to the total.

04

Assessment

  • The river roughly seven-doubles in thirty years — $5.4T to $39.5T — with visible surges around the 2008 crisis and the 2020 pandemic, when the public band widens sharply as the Treasury issues into the market.
  • Composition tilts toward the public: the intragovernmental band ($1.6T → $7.7T) grows far more slowly than the public band ($3.8T → $31.8T), so the debt is increasingly market-held.
  • The intragovernmental band's slowing growth foreshadows trust-fund pressure — those balances rise only while the funds run surpluses, and they have flattened near $7.7T in the most recent readings.
05

Advantage

  • What did it cost to service all this borrowing?The Shape of Money
  • How fast were prices rising as the debt grew?The Price Shock, in Bands
  • How did another economy's output hold up over the same span?Britain's Lost Month