The 2011 UEFA European Under-21 Championship was the 18th staging of UEFA's European Under-21 Championship. The final tournament was hosted by Denmark between 11 and 25 June 2011.

The UEFA European Under-21 Championship, the UEFA Under-21 Championship or simply the Euro Under-21, is a biennial football competition contested by the European men's under-21 national teams of the UEFA member associations. Since 1992, the competition also serves as the UEFA qualification tournament for the Summer Olympics.