The O<sub>2</sub> Academy Liverpool (formerly the L2 and Carling Academy Liverpool) is a music venue in Hotham Street, Liverpool, England, that is run by the Academy Music Group.
The building is a 19th century warehouse that was converted into a music venue in 2000. It closed in 2002 and then reopened after refurbishment in September 2003.
The main building consists of performance areas. O<sub>2</sub> Academy1 can hold 1,200 (900 floor/300 balcony) people while O<sub>2</sub> Academy2 can hold 500. There are also 5 bars in the building which cater for the visitors who come to see shows (two in O<sub>2</sub> Academy2 and three in O<sub>2</sub>Academy1.
On 6 November 2008, it was announced that Telefónica Europe (owners of the O<sub>2</sub> Network in the UK) had become the new sponsor of all Academy venues, in a deal with music promoter Live Nation Entertainment. The deal, which lasts for five years, sees all venues rebranded "The O<sub>2</sub> Academy", in line with Telefónica's purchase of naming rights to the Millennium Dome (now The O<sub>2</sub>).