5th Congress

5th Congress may refer to:
 * 5th Congress of the Philippines
 * 5th Congress of the Russian Social Democratic Labour Party
 * 5th United States Congress
 * 5th National Congress of the Communist Party of China
 * 5th National Congress of the Communist Party of Vietnam
 * 5th Congress of the Lao People's Revolutionary Party
 * 5th Congress of the Communist Party of Cuba
 * 5th Congress of the Workers' Party of Korea
 * Hague Congress (1872), the 5th Congress of the First International
 * International Socialist Congress, Paris 1900, the 5th Congress of the Second International