Look up National Socialism in Wiktionary, the free dictionary.

National Socialism most often refers to Nazism, the ideology of the Nazi Party, which ruled Nazi Germany from 1933 to 1945.

National Socialism may also refer to:

Ethnic German movements related to Nazism (pre-1945)

Austrian National Socialism, an early influence on the NSDAP
German National Socialist Workers' Party (Czechoslovakia) (Sudeten German, antisemitic)
Sudeten German Party (Sudeten German, pro-annexation by Germany, successor of the above)
Strasserism, a breakaway movement from German Nazism

Non-German movements related to Nazism (pre-1945)

National Socialist Bulgarian Workers Party (1930s)
National Unity Party of Canada (pro-Anglo-Canadian/French-Canadian)
National Socialist Movement of Chile (1930s)
National Socialist Workers' Party of Denmark (German-style Nazi, antisemitic)
Greek National Socialist Party (Italian-style fascist, pro-Hitler)
Hungarian National Socialist Party (German-style Nazi, antisemitic)
National Socialist Dutch Workers Party (1920s–1930s; favoured German annexation of the Netherlands)
National Socialist Movement in the Netherlands (1930s–1940s; unlike the above, it nominally supported an independent Netherlands)
National Socialist Workers' Party of Norway (German-style Nazi, antisemitic)
Nasjonal Samling (Norwegian, German-style Nazi, anti-Semitic, anti-Masonic)
National Socialist Party (Romania) (Romanian, German-style Nazi)
Swedish National Socialist Farmers' and Workers' Party (pro-Hitler, founded in 1924)
Swedish National Socialist Party (founded in 1930 through a merger of Nazi and fascist groups)
National Socialist Workers' Party (Sweden) (split from the above in 1933, became more Strasserite and independently Swedish before declining during World War II)
South African Gentile National Socialist Movement (1930s–1940s; pro-apartheid, white, antisemitic)

National Socialist League (United States) (American, gay, Aryan, pro-Hitler, historical)
National Socialist Movement (United States) (American, contemporary)
National Socialist Party of America (white, antisemitic, anti-black, historical)

Golden Dawn (Greece) (anti-Albania, anti-immigrants, islamophobic, contemporary)
Iranian National Socialist Party (SUMKA), created in 1952 (pro-Hitler, anti-Arab, anti-Turk, historical)
National Socialist Movement of Denmark (contemporary)
National Socialist Movement of Norway (contemporary)
National Socialist Party of New Zealand (German-style Nazi, anti-Semitic, historical)
Russian National Socialist Party (Russian nationalist, fascist, anti-immigrant, contemporary)
Social-National Party of Ukraine (Ukrainian nationalist, Ethnic nationalist, Anti-communist)
Svoboda (political party) (Ukrainian nationalist, Ultranationalist, Right-wing populism)

Popular socialism, its democratic forms are known as national socialism in certain countries
Ba'ath Party, an Arab national-socialist party in Iraq and Syria
Czech National Social Party, founded in Austria-Hungary in 1898 as a centre-left party advocating Czech independence
Czech National Socialist Party, a small centre-left party which broke away from the above in 2005
National-Social Association, a small centre-left Christian liberal party in Germany
National Socialist Party (Jordan), a left-wing political party in Jordan that existed from 1954 to 1957
National Socialist Party (Philippines), a political party founded in the Philippines in 1935
National Socialist Party (UK), a breakaway group from the British Socialist Party formed in 1916
Jatiya Samajtantrik Dal (National Socialist Party), a small socialist party in Bangladesh
National Socialist Council of Nagaland, a Maoist insurgent group in India
National Socialist Party of Tripura, a party advocating Tripuri self-determination in India
Bernsteinism, originally called “revisionism”, the first example of a wider trend called by the same name; Lenin referred to it as "national socialism"