Theatre Royal, Wexford, Opera house in Wexford, Ireland.

The Theatre Royal was an opera house and performance venue on Wexford's High Street, built by William Taylor in 1831 and opened in January 1832. Its auditorium kept the original stage through later alterations, but the upper balcony, known as "the gods", was removed and replaced by a steeply raked circle that remained until the building closed in 2005. It was demolished in early 2006 and replaced on the same site by the National Opera House, a building 3½ times larger with a 771-seat auditorium and a 176-seat studio space.

William Taylor built the Theatre Royal in 1831 and it opened in January 1832. In 1942 its last private owner sold it to a consortium that converted it into a cinema, though the stage was kept; removing the upper balcony created a steeply raked circle and meant no festival was held in 1960. The Wexford Festival Trust acquired it in the 1950s, and after a 1987 overhaul it reopened on 5 September 1987. It closed in 2005 and was demolished in early 2006.

The Theatre Royal hosted the annual Wexford Festival Opera and the amateur Wexford Light Opera Society, which performed there every year. Its 1987 reconstruction, with extra rows cantilevered over the balcony, extended the festival's duration and raised capacity per performance by 28%. The building closed in 2005 and was demolished in early 2006.

The Theatre Royal stood on High Street, and the houses the festival bought behind it from the 1990s gave extra cloakroom, toilet and bar areas plus a smokers' room. Later purchases allowed direct access from the foyer to backstage without crossing the auditorium. The largest, the old The People Newspapers property next door, was acquired in 2000.

The Theatre Royal closed in 2005 and was demolished in early 2006; the National Opera House that replaced it on the same site opened on 5 September 2008 with a live broadcast of RTÉ's The Late Late Show. Its first opera was Rimsky-Korsakov's Snegurochka (The Snow Maiden), staged from 16 October 2008.