The League of Communists of Slovenia (Slovene: Zveza komunistov Slovenije, ZKS; Serbo-Croatian: Savez komunista Slovenije) was the Slovenian branch of the League of Communists of Yugoslavia, the sole legal party of Yugoslavia from 1945 to 1990. It was established in April 1937 as the Communist Party of Slovenia and was the first autonomous sub-national branch of the federal party. Its initial autonomy was further amplified with the Yugoslav constitution of 1974, which devolved greater power to the various republic level branches.

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League of Communists of Slovenia Zveza komunistov Slovenije Savez komunista Slovenije
Leader	President of the League of Communists of Slovenia
Founded	18 April 1937
Dissolved	4 February 1990
Succeeded by	United List of Social Democrats (ZLSD)
Headquarters	Ljubljana, SR Slovenia, Yugoslavia
Ideology	Communism Marxism-Leninism Titoism Democratic socialism (after 1989)
Political position	Left-wing to far-left
National affiliation	League of Communists of Yugoslavia
Colours	Red
Party flag
Politics of Slovenia Political parties Elections Slovenian branch of the League of Communists of Yugoslavia

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In 1989 Slovenia passed amendments to its constitution that asserted its sovereignty over the federation, its right to secede and set foundations to a multi-party system. These amendments were bitterly opposed by the leadership of Serbia under Slobodan Milošević. On 23 January 1990, the Slovene delegation, headed by Milan Kučan, left the Party Congress of the League of Communists of Yugoslavia, leading to the collapse of the all-Yugoslav party.

On 4 February 1990 the League of Communists of Slovenia changed its name to the League of Communists of Slovenia – Party of Democratic Renewal (Zveza komunistov Slovenije – Stranka demokratične prenove, ZKS-SDP), and shortly afterwards began negotiations with the Democratic Opposition of Slovenia for the establishment of a multi-party system. In April 1990, the reformed Communists lost the elections to the DEMOS coalition.

• Franc Leskošek (1937–1945) (1897–1983)
• Boris Kidrič (1945–1946) (1912–1953)
• Miha Marinko (1946–1966) (1900–1983)
• Albert Jakopič (October 1966– December 1968) (1914–1996)
• Franc Popit (December 1968 – April 1982) (1921–2013)
• Andrej Marinc (April 1982 – May 1986) (born 1930)
• Milan Kučan (May 1986 – December 1989) (born 1941)
• Ciril Ribičič (December 1989 – May 1990) (born 1947)

Other influential leaders

• Edvard Kardelj (1910–1979)
• Tone Tomšič (1910–1942)
• Vida Tomšič (1913–1998)
• Boris Kraigher (1914–1967)
• Lidija Šentjurc (1911–2000)
• Ivan Maček (1908–1993)
• Sergej Kraigher (1914–2001)
• Boris Ziherl (1910–1976)
• Stane Dolanc (1925–1999)
• Mitja Ribičič (1919–2013)
• Prežihov Voranc (1893–1950)
• Dragotin Gustinčič (1882–1974)
• Stane Kavčič (1919–1987)
• Viktor Avbelj (1914–1993)
• Vladimir Krivic (1914–1996)
• Ivan Regent (1884–1967)
• Jože Potrč (1903–1963)
• Aleš Bebler (1907–1981)
• Joža Vilfan (1908–1987)
• Mirko Košir (1905–1951)
• Angela Vode (1892–1985)
• Dušan Kermavner (1903–1975)
• France Klopčič (1903–1986)
• Dušan Pirjevec (1921–1977)
• Franc Šetinc (1929–2016)
• Janez Vipotnik (1917–1998)
• Vinko Hafner (1920–2015)
• Jože Smole (1927–1996)

• History of Slovenia
• Timeline of Slovenian history
• League of Communists of Yugoslavia
  • League of Communists of Bosnia and Herzegovina
  • League of Communists of Croatia
  • League of Communists of Macedonia
  • League of Communists of Montenegro
  • League of Communists of Serbia
    • League of Communists of Vojvodina
    • League of Communists of Kosovo
• List of leaders of communist Yugoslavia
• Socialist Federal Republic of Yugoslavia