5th Congress

5th Congress may refer to:
 * 5th Congress of the Communist Party of Yugoslavia (1948)
 * 5th Congress of the Philippines (1962–1965)
 * 5th Congress of the Russian Social Democratic Labour Party (1907)
 * 5th Congress of the Workers' Party of Korea (1970)
 * 5th National Congress of the Chinese Communist Party (1927)
 * 5th National Congress of the Communist Party of Vietnam (1982)
 * 5th National Congress of the Kuomintang (1935)
 * 5th National Congress of the Lao People's Revolutionary Party (1991)
 * 5th National People's Congress (1978–1983)
 * 5th United States Congress (1797–1799)
 * Hague Congress (1872), the 5th Congress of the First International
 * International Socialist Congress, Paris 1900, the 5th Congress of the Second International