Island Falls Opera House, Opera house in Island Falls, Maine, US.

Island Falls Opera House is an L-shaped wooden building at the intersection of Old Patten Road, Burleigh Street, and Sewall Street that has served multiple purposes since construction. The structure contains a second-floor theater, a former general store on the ground level, and residential spaces throughout.

Columbus Lamb Pettengill built the structure in 1894 as a combined commercial and residential property with a general store, theater, and living quarters that reflected the community's economic needs. In the 1920s the theater transitioned from silent films with piano accompaniment to sound movies, bringing modern entertainment to the rural region.

The hall was built in 1894 by Columbus Lamb Pettengill and his son on land bought from W. W. Sewall, whose deeds of sale barred the sale of alcohol on the property. It became a major local entertainment venue, adapted for motion pictures in the 1920s. The theater retains its original seating and wall decorations, and the lobby keeps the original ticket booth.

The building stands at the junction of Old Patten Road, Burleigh Street and Sewall Street in the center of Island Falls, within walking distance of the town's main intersection. After the December 2020 sale, the Hartins carried out cleanup and repairs and plan to reopen the theater and storefront; two Inn Room units are planned for overnight, weekend or monthly stays, with no long-term rentals.

The interior preserves original features from the building's early days, including wooden counters from the old store and decorative arches that lead to the parlor room. These details allow visitors to understand how the space functioned and was organized during its original period.