The Communist Party of Slovakia (Slovak: Komunistická strana Slovenska, KSS) was a communist party in the Slovak Socialist Republic. It was formed in May 1939, when the Slovak State was created, as the Slovak branches of the Communist Party of Czechoslovakia (KSČ) were separated from the mother party. When Czechoslovakia was again established as a unified state, the KSS was still a separate party for a while (1945–1948). On 29 September 1948, it was reunited with the KSČ and continued to exist as an "organizational territorial unit of the KSČ on the territory of Slovakia". Its main organ (and thus the main newspaper in Slovakia at the time) was Pravda.
After the merger KSS functioned as a regional affiliate of the KSČ, not as an independent political institution. Therefore, the organizational structure of the KSS mirrored that of the KSČ: the KSS Congress held session for several days every five years (and just before the KSČ's Congress), selecting its Central Committee members and candidate members, who in turn selected a Presidium, a Secretariat, and a First Secretary (i.e. party leader).
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