Wonder Ballroom, Music venue in Eliot neighborhood, Portland, US.

Wonder Ballroom is a music venue in the Eliot neighborhood with a spacious main room and elevated stage. The primary hall has ample floor space for standing and dancing, while a basement lounge offers cocktails and food service throughout events.

The building was constructed in 1914 as a gathering place for the Ancient Order of Hibernians, a fraternal organization. Over time it evolved into a performance venue that now hosts music and cultural events.

The 2,700-square-foot Mark Woolley Gallery, once the Hibernians' assembly room, shows works by local artists. The building's Irish roots show in its 1914 origin as a hall for the Ancient Order of Hibernians, and the auditorium keeps a gothic-style chandelier and sconces. The basement holds the Under Wonder Lounge, which the venue planned in September 2025 to turn into a lounge for concertgoers.

The venue is typically crowded during evening events, especially when popular acts perform. Visitors should expect to stand for extended periods and wear comfortable shoes for the duration.

The building was listed on the National Register of Historic Places in 2005 as the Hibernian Hall, cited for its historic and architectural significance. It was designed by the Portland firm Jacobberger & Smith, and the Hibernians held their first meeting there on September 10, 1914.