A kurgan (Russian: курга́н) is a tumulus, a type of burial mound or barrow, heaped over a burial chamber, often of wood. The Russian noun, which is already attested in Old East Slavic, is borrowed from an unidentified Turkic language, compare Modern Turkish kurğan, which means "fortress". They are mounds of earth and stones raised over a grave or graves. Associated with its use in Soviet archaeology, the word is now widely used for tumuli in the context of Eastern European and Central Asian archaeology.
The earliest kurgans date to the 4th millennium BC in the Caucasus, and are associated with the Indo-Europeans. Kurgans were built in the Eneolithic, Bronze, Iron, Antiquity and Middle Ages, with ancient traditions still active in Southern Siberia and Central Asia. Kurgan cultures are divided archeologically into different sub-cultures, such as Timber Grave, Pit Grave, Scythian, Sarmatian, Hunnish and Kuman-Kipchak.
Many placenames contain the word "kurgan".
The earliest known kurgans are dated to the 4th millennium BC in the Caucasus. Kurgan barrows were characteristic of Bronze Age peoples, and have been found from the Altay Mountains to the Caucasus, Ukraine, Romania, and Bulgaria. Kurgans were used in the Ukrainian and Russian steppes, their use spreading with migration into eastern, central, and northern Europe in the 3rd millennium BC.