The Queen's Theatre was a London theatre established in 1867 on the site of St Martin's Hall, a large concert room that had opened in 1850. It stood on the corner of Long Acre (formerly Charles Street) and Endell Street, with entrances in Wilson Street and Long Acre. The site is within the modern Camden, part of Covent Garden.
St Martin's Hall contained a 3,000-seat main hall and a 500-seat lecture hall. It was used for musical recitals, lectures and political meetings. The Queen's Theatre, one of the largest in London, had a capacity of 4,000 seats. The theatre closed after barely more than a decade, in 1878.