The Ivan Vazov National Theatre (Bulgarian: Народен театър „Иван Вазов“, Naroden teatar „Ivan Vazov“) is Bulgaria's national theatre, as well as the oldest and most authoritative theatre in the country and one of the important landmarks of Sofia, the capital of Bulgaria. It is located in the centre of the city, with the facade facing the City Garden.

Founded in 1904 by the artists from the Salza i Smyah company, it was initially called simply the National Theatre, but before being named after the prominent writer Ivan Vazov it also bore the name of Krastyu Sarafov between 1952 and 1962. The theatre's Neoclassical building, designed by famous Viennese theatre architects Hermann Helmer and Ferdinand Fellner, was finished in 1906 and opened on 3 January 1907.