2nd Congress may refer to:

• 2nd Congress of the Philippines (1949–1953)
• 2nd Congress of the Russian Social Democratic Labour Party (1903)
• 2nd Congress of the Workers' Party of North Korea (1948)
• 2nd National Congress of the Chinese Communist Party (1922)
• 2nd Congress of the Communist Party of India (1948)
• 2nd National Congress of the Kuomintang (1926)
• 2nd National Congress of the Lao People's Revolutionary Party (1972)
• 2nd National People's Congress (1959–1964)
• 2nd United States Congress (1791–1793)
• 2nd World Congress of the Comintern (1920)
• International Socialist Labor Congress of Brussels, 1891, the 2nd Congress of the Second International
• Lausanne Congress (1867), the 2nd Congress of the First International

This disambiguation page lists articles associated with the title 2nd Congress.
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