Merrill Auditorium is a 1900 seat performing arts facility located in the Arts District of downtown Portland, Maine.
The Auditorium was originally built in 1912 to replace two former halls both destroyed by fire. What was then known as City Hall Auditorium was a classic example of colonial style, boasting porticos and columns, a deep court and large wings.

Cyrus Curtis, a publishing tycoon, donated the Kotzschmar Memorial Organ, a celebrated instrument with 5,000 pipes of varying sizes that was incorporated into the stage. Many famous performers have graced the auditorium stage throughout its long history, including John Philip Sousa, George Gershwin, Sergei Rachmaninoff, Vladimir Horowitz, La Scala Grand Opera Company, Jessye Norman, Marilyn Horne, Alvin Ailey, Itzhak Perlman, Van Cliburn, and Ray Charles.

In 1997, through efforts of the City of Portland, PCA Great Performances, the Portland Symphony Orchestra, concerned citizens and the corporate and philanthropic communities, the renamed Merrill Auditorium was completely renovated with improved acoustics, sightlines and stage facilities.