The current Constitution of Romania is the seventh permanent constitution in modern Romania's history. It is the fundamental governing document of Romania that establishes the structure of its government, the rights and obligations of citizens, and its mode of passing laws. It stands as the basis of the legitimacy of the Romanian government. Adopted on 21 November 1991, it was approved on 8 December 1991 in a national referendum and promulgated on the same day.

Regulamentul Organic was a quasi-constitutional organic law enforced in 1831–1832 by the Imperial Russian authorities in Moldavia and Wallachia. The document partially confirmed the traditional government and set up a common Russian protectorate which lasted until 1854. The Regulamentul itself remained in force until 1858. Conservative in its scope, it also engendered a period of unprecedented reforms which provided a setting for the Westernization of the local society. The Regulamentul offered the two Principalities their first common system of government.