The Imperial Theatre is a historical theater at King's Square in Saint John, New Brunswick.

It was designed by Philadelphia architect Albert Westover and built in 1912 by the Imperial Theatre by the Keith-Albee-Orpheum Corporation vaudeville chain of New York City and their Canadian subsidiary, the Saint John Amusements Company Ltd.

[2] The theatre was designed as a modern adaptation of the Italian Renaissance, and was used both for live vaudeville acts as well as "talkies".

The theatre has been restored to its 1913 glory, with the original mouldings and intricate plasterwork having been repaired or replicated.

The arch is a spectacular architectural feat, and frames the stage beautifully from all viewing positions.