Reichstag may refer to:

• Reichstag (institution), the Diets or parliaments of the Holy Roman Empire, of the Austrian-Hungarian monarchy and of Germany (Second and Third Reich) until 1945
• Reichstag (building), the building in Berlin in which the German legislature met from 1894 to 1933 and again since 1999
• The Reichstag fire in 1933, which provided a pretext for the Nazis to increase their power
• Riksdag, the parliament of Sweden
• Parliament of Finland, called Riksdag in Swedish
• Riksdag/Reichtag (Riigikogu) is the name of the Parliament of Estonia

Райстаг | Reichstag | Reichstag | רייכסטאג | 国会 (ドイツ) | Riksdag | Reichstag | Reichstag | Рейхстаг | Reichstag (olika betydelser)