A Night at the Opera is the fourth studio album by British rock group Queen, released in November 1975. It was the most expensive album ever recorded at the time of its release. A commercial success, A Night at the Opera has been voted by the public and cited by music publications as one of Queen's finest works.

The album takes its name from the Marx Brothers film A Night at the Opera, which the band watched one night at the studio complex when recording. The album was released  in the US, where it peaked at No. 4 on the Billboard 200 and became the band's first platinum selling album in the US.