Samut Prakan is part of the Bangkok Metropolitan Region, with an area of 1004 square kilometers. Neighbouring provinces are Bangkok, to the north and west, and Chachoengsao to the east. The part of the province on the west side of the river consists mostly of rice paddies and shrimp farms as well as mangrove forests, while the eastern part is the urban centre, including industrial factories. It is part of the Bangkok metropolis. The urbanization on both sides of the provincial boundary is identical. The province has a coastline of approximately 47.5 kilometres.