St George's Barracks was a military installation in Orange Street, behind the National Gallery, in London.

The barracks, which were designed by John Nash and built as the main recruiting depot for the London area,[1] were completed in 1826.

[2] Recruiting sergeants for the regiments based at the barracks tended to operate within a tight area defined by St. George's Barracks, Trafalgar Square and Westminster Abbey.

[3] The barracks, which were also used as facilities to accommodate regiments of foot guards,[4] were retained into the 20th century because of the need for troops to be at hand to quell disturbances in Trafalgar Square.

[5] They were ultimately demolished in 1911[6] and the site is now occupied by the National Portrait Gallery.