12th Congress

12th Congress may refer to:


 * 12th United States Congress, 1811–1813
 * 12th Congress of the Russian Communist Party (Bolsheviks), 1923
 * 12th National Congress of Kuomintang, 1981
 * 12th National People's Congress, 2013–2018
 * 12th National Congress of the Communist Party of Vietnam, 2016