Who Are the Most Indebted Countries?

Public Debt (As % of GDP) (%), 2017
Economy | February 26, 2018
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Based on a comparison of 165 countries in 2022, Japan ranked the highest in public debt as a share of GDP with 240% followed by Greece and Lebanon. On the other end of the scale was Hong Kong with 0.058%, Brunei with 2.84% and Afghanistan with 7.64%.

Data for more countries are available at Public Debt (As % of GDP) indicator page.