The National Representatives' Congress, the precursor of the current National Assembly of Vietnam, convenes in Sơn Dương.

The National Assembly of the Socialist Republic of Vietnam (Vietnamese: Quốc hội nước Cộng hoà xã hội chủ nghĩa Việt Nam) is the national legislature of the Socialist Republic of Vietnam.

The Constitution of Vietnam recognizes the assembly as "the highest organ of state power." The National Assembly, a 500-delegate unicameral body elected to a five-year term, meets twice a year. The assembly appoints the president (head of state), the prime minister (head of government), the chief justice of the Supreme People's Court of Vietnam, the head of the Supreme People's Procuracy of Vietnam (or 'Supreme People's Office of Supervision and Inspection'), and the 21-member Government. Ultimately, however, the Communist Party of Viet Nam (CPV) has great influence over the executive and exercises control through the 150-member Central Committee, which elects the 15-member Politburo at national party congresses held every five years. Members of the party hold all senior government positions.

Constitutionally, the National Assembly is the highest government organization and the highest-level representative body of the people. It has the power to draw up, adopt, and amend the constitution and to make and amend laws. It also has the responsibility to legislate and implement state plans and budgets. Through its constitution-making powers it defines its own role and the roles of the Vietnamese State President, the Vietnamese Government, the local people's councils and people's committees, the Supreme People's Court, and the Supreme People's Procuracy. The assembly can elect and remove government ministers, the chief justice of the Supreme People's Court, and the procurator general of the Supreme People's Procuracy. Finally, it has the power to initiate or conclude wars and to assume other duties and powers it deems necessary. The term of each National Assembly is five years, and meetings are convened twice a year, or more frequently if called for by the National Assembly Standing Committee.

The National Assembly has gradually been more active and covered in Vietnam's political life. Although most legislation still originates from the government, such legislation is now more hotly debated in the National Assembly and attract a larger audience. As of 2009, the most debated legislation issues have included Vietnam's bauxite project in the Central Highlands and Vietnam's plan for new nuclear power stations in Ninh Thuan.