Sydir Artemovych Kovpak (Ukrainian: Си́дір Арте́мович Ковпа́к; Russian: Си́дор Арте́мьевич Ковпа́к, romanized: Sidor Artemyevich Kovpak), (June 7, 1887 – December 11, 1967) led Soviet partisans in Ukraine from 1941 to 1944 during the Axis-Soviet War phase of World War II.

Kovpak was born to a poor Ukrainian peasant family in Kotelva village in Kharkov Governorate, Russian Empire (in present-day Ukraine). Kovpak is of Zaporozhian Cossack descent. For his military service in World War I, he was awarded two Crosses of St. George personally by the Emperor Nicholas II of Russia (an award for exceptional military heroism). After the Russian Revolution he joined the All-Russian Communist Party (Bolsheviks) and fought for the Red Army partisan units against the German forces, as well as against Denikin's White Army in Vasily Chapayev's cavalry division. In the interwar period he was a head of the local government in the town of Putyvl, Sumy Oblast (province).

At the time of the German invasion of Soviet Ukraine partisan units led by Sydir Kovpak waged guerrilla warfare against Axis forces originally in partisan strongholds in Sumy and Bryansk regions but later its operation spread deep into German-occupied territory including Kyiv, Zhytomyr, Rivne, Homyel, Volyn and other regions. These partisan units also fought against the nationalist Ukrainian Insurgent Army. In 1944 partisans under Kovpak's leadership raided enemy forces throughout western Ukraine and Belarus and even reached Romanian border regions during the Carpathian raid inflicting heavy casualties on the Germans.

Kovpak mastered guerrilla tactics and was awarded Hero of the Soviet Union title twice (1942; 1944). In the summer of 1943 Germans managed to hunt down and kill Kovpak's second in command Semyon Rudnev who was replaced by a new right-hand man Petro Vershigora who would later become a writer and dedicate his books to Kovpak's underground resistance.

Sydir Kovpak was promoted to the rank of Major General in 1943. According to the memoirs of his lieutenant Vershigora, his promotion and General's stars were airdropped to his partisan unit's position deep behind the front lines. After the end of the Second World War Sydir Kovpak held key positions in the leadership of Soviet Ukraine, including Vice Chairman of the Supreme Court of Ukraine in 1947 and Supreme Soviet of Ukraine in 1967. He also was a member of the Supreme Soviet of the Soviet Union for the 2nd through 7th convocations.

Kovpak was portrayed (by Konstantin Stepankov) in Soviet film trilogy Duma o Kovpake (Дума о Ковпаке, Poem of Kovpak):

A TV documentary Его звали ДЕД (He was called GRANDPA) (Ukrainian language, produced by TRK Era, director Oleksiy Barbaruk-Trypilsky, 36 min, screened in 2011) documents Kovpak's life during the war.