The 1020s is the third decade of the 11th century expanded from January 1, 1020 to December 31, 1029

Eastern Hemisphere in 1025AD.

Events of 1020

By place

Asia

• Goryeo and the Liao Dynasty exchange embassies following a seven-year territorial dispute.

Europe

• City of Saint-German-en-Laye founded
• Third Intalian campaign of Henry II of Germany
• Canute the Great codifies the law of England