This list covers the countries with the biggest IOU's. The United States' definitely owns the ranks for having the biggest IOU, owing $1.1 trillion to China alone. But, the U.S. is not the most indebted nation in the world. This list is organized by countries with the highest percentage of debt as a percentage of a county's GDP.
Debt equals 234% of GDP
#28 on Best Soccer Countries Eversee more on Japan
Debt equals 139% of GDP
#23 on Best Soccer Countries Eversee more on Greece
Debt equals 120% of GDP
Also Rankedsee more on Italy