Teatr Wielki w Lodzi, The Grand Theater in Lodz is an opera house in Lodz, Poland. It is the largest theatre in the city, specialising in opera, operetta and ballet. It was opened on 19 January 1967 and by the end of 2005 it had staged 240 premieres. The theatre is one of the most important operatic venues in Poland. Its director is Kazimierz Kowalski.

The house has staged works by composers of the past (including Tchaikovsky, Mozart, Verdi and Wagner) as well as contemporary figures (such as Krzysztof Penderecki and Bogdan Pawlowski). Its productions have travelled abroad throughout Europe and the United States. World-famous artists, such as Victoria de los Ángeles and Andrea Bocelli, have appeared on its stage. Directors who have worked there include Adam Hanuszkiewicz and Ryszard Peryt.

The Teatr Wielki, located on Plac Dabrowskiego, is the second largest opera house in Poland and one of the largest in Europe, with an auditorium which can seat 1070 people.

The building also host other events, such as New Year Balls and fashion shows. The most famous of these is the international film festival of the art of cinematography "Camerimage".