2nd Congress

2nd Congress may refer to:
 * International Socialist Labor Congress of Brussels, 1891, the 2nd Congress of the Second International
 * Lausanne Congress (1867), the 2nd Congress of the First International
 * 2nd Congress of the Philippines
 * 2nd Congress of the Russian Social Democratic Labour Party
 * 2nd United States Congress
 * 2nd National Congress of the Communist Party of China
 * 2nd National Congress of the Communist Party of Vietnam
 * 2nd Congress of the Lao People's Revolutionary Party
 * 2nd Congress of the Communist Party of Cuba
 * 2nd Congress of the Workers' Party of North Korea
 * 2nd World Congress of the Comintern