Great National Assembly or Grand National Assembly may refer to:

• Great National Assembly of Alba Iulia, an assembly of Romanian delegates that declared the unification of Transylvania and Romania
• Great National Assembly (Socialist Republic of Romania), the legislature of the Socialist Republic of Romania
• Grand National Assembly of Turkey, the unicameral Turkish legislature
• Grand National Assembly of Bulgaria, a special convention of the National Assembly

This disambiguation page lists articles associated with the title Great National Assembly.
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