Ben Tre's topographical shape looks like an ososceles triangle, lying on the West-North and South-East axis, with its base conjoining on the South China Sea. The total length of coastline is 65 km. The two side lines of the triangle is contoured by the Co Chien River and Tien River, which are also the natural borders between Ben Tre and Tra Vinh and Tien Giang provinces, respectively, while the North vertex borders Vinh Long province.

A province in the Delta, Ben Tre has relatively flat terrain, about one or two metres above sea level. Intermittently, there are several places that are 3 or 5 metres higher than the surroundings, some of them are sandy mounds intermittently spotting between rice fields and coconut woods. There are no forests but offshoot woodlands and stretches of mangrove forests along the coastline.

Ben Tre topography is made up with three large islets: Bao, Minh and An Hoa, formed from centuries of alluvial deposition brought by the 4 main rivers: Tien, Ba Lai, Ham Luong, and Co Chien Rivers. Besides, there is a complex grid of interwoven canals and ditches connecting through the main rivers, not only enabling traffic throughout the province's waterway system, but also harboring abundant agricultural resources.