The Mayfair Theatre, also known as the Auditorium Theatre and Auditorium Music Hall, is a historic theatre site in Baltimore, United States. Originally opened in 1880 as a bathing house, the site was later demolished and rebuilt in 1904 as a theatre, which was closed in 1986.
In 2016 the building was demolished except for the facade and lobby. The remnant is listed as a Baltimore City Landmark and remains the focus of redevelopment plans.