The Sredny Stog culture is a pre-kurgan archaeological culture from the 5th millennium BC. It is named after the Russian term for the Dnieper river islet of today's Seredny Stih, Ukraine, where it was first located. It was situated across the Dnieper river on both its shores, with sporadic settlements to the west and east. One of the best known sites associated with this culture is Dereivka, located on the right bank of the Omelnik, a tributary of the Dnieper, and is the most impressive site within the Sredny Stog culture complex, being about 2,000 square meters in area.
The Sredny Stog culture seems to have had contact with the agricultural Cucuteni-Trypillian culture in the west and was a contemporary of the Khvalynsk culture.
In its three largest cemeteries, Alexandria (39 individuals), Igren (17) and Dereivka (14), evidence of inhumation in flat graves (ground level pits) has been found. This parallels the practise of the Cucuteni-Trypillian culture, and is in contrast with the later Yamna culture, which practiced tumuli burials, according to the Kurgan hypothesis. In Sredny Stog culture, the deceased were laid to rest on their backs with the legs flexed. The use of ochre in the burial was practiced, as with the kurgan cultures. For this and other reasons, Yuri Rassamakin suggests that the Sredny Stog culture should be considered as an areal term, with at least four distinct cultural elements co-existing inside the same geographical area.
The expert Dmytro Telegin has divided the chronology of Sredny Stog into two distinct phases. Phase II (ca. 4000–3500 BC) used corded ware pottery which may have originated there, and stone battle-axes of the type later associated with expanding Indo-European cultures to the West. Most notably, it has perhaps the earliest evidence of horse domestication (in phase II), with finds suggestive of cheek-pieces (psalia).