O2 Arena may refer to:

• The O2 Arena, London
• O2 Arena, Prague
• The 3Arena, Dublin, formerly known as The O2
• The Uber Arena, Berlin, formerly known as O2 World Berlin
• The Barclays Arena, Hamburg, formerly known as O2 World Hamburg

This disambiguation page lists articles associated with the title O2 Arena.
If an internal link led you here, you may wish to change the link to point directly to the intended article.