National Union may refer to:

• National Union (Chad), a political party
• National Union (Chile), an alliance during the Government Junta of Chile (1924)
• National Union Movement, a pro-Pinochet political party from 1983 to 1987
• National Union Party (Costa Rica), several liberal conservative parties
• National Union (Gabon), a political party
• National Union Party (Iran), a royalist party
• National Union (Israel), an alliance of right-wing and nationalist parties from 1999 to 2013
• National Union (Italy, 1923), a pro-fascist Catholic party
• National Union (Italy, 1924), an anti-fascist party
• National Union (Italy, 1947), a parliamentary group
• National Union (Latvia), a far-right party from 1919 to 1934
• National Union (Madagascar), an alliance of TIM, AVI and RPSD
• National Union (Netherlands), a fascist party active during the 1920s and 1930s
• National Union (Peru), a political party
• National Union (Portugal), a party of the Estado Novo regime from 1930 to 1974
• National Union (Poland), a landowners' organization in the Prussian partition from 1910 to 1914
• National Union (South Africa), a short-lived party founded in 1960
• National Union (Spain, 1900), a regenerationist party from 1900 to 1902
• National Union (Spain), a far right electoral coalition in 1979
• National Union (Switzerland), a French-speaking fascist party between 1932 and 1939
• National Union (Egypt), Nasser's party in the Egypt and the United Arab Republic, 1957–1962
• National Union Party (United States), a temporary name for the Republican Party in 1864

• National Union (club), a political London gentlemen's club from 1887 to c.1900

• National Union of Greece, an anti-Semitic nationalist party from 1927 to 1944
• National Unionist Party (Greece), a centre-left party from 1935 to 1950
• Nationalist Union of the People, a political alliance in Bolivia from 1978
• Kenya African National Union, a political party
• Liberia National Union, a political party
• Lithuanian Nationalist Union, a political party from 1924 to 1940
• Russian National Union, a Neo-Nazi party from 1993 to c.1998
• Transvaal National Union, an organisation supporting uitlanders from 1895 to 1896
• Ukrainian National Union (political party), a far-right organisation
• Union Nationale (Quebec), a provincial party in Canada from 1935 to 1989
• Union of Nationalists, a political alliance in Greece from the 1940s
• National Unity (disambiguation)
• National Union for Democracy and Progress (disambiguation)

This disambiguation page lists articles associated with the title National Union.
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