Lewiatan (Polska Sieć Handlowa Lewiatan) is one of Poland's largest grocery-retail franchise and affiliation networks. It groups neighbourhood convenience shops and mid-size supermarkets run by independent local merchants under a shared brand. It was created to band Polish independent shopkeepers together so they could compete with foreign discount and hypermarket chains, and so it positions itself as the local, good-neighbour alternative with fresh and regional assortment. The network is part of the larger Eurocash group, which underpins its wholesale supply.