Shyamnagar is located at in the Ganges Delta at an elevation of . It is spread linearly along the banks of the River Hooghly in a north–south direction. Much of the city was originally a vast wetland, reclaimed over the decades to accommodate the city's burgeoning population. The remaining wetland, known as East Calcutta Wetlands has been designated a "wetland of international importance" under the Ramsar Convention.
