The overhead water tank consists of a tank supported by a scaffolding system composed of columns, braces, and foundations. Overhead water storage tanks have generally performed well in seismic zones. Even so, a large number of tank collapses have been discovered during earthquakes from, as early as the San Francisco earthquake (1906) to the Bhuj earthquake (2001). The observed damage in recent earthquakes shows that it is necessary to choose new methods for transformation while designing the structures. In many earthquake-prone countries, water tanks are continuously being retrofitted or build with control devices to decrease caused stresses, displacements, and base shear during seismic activity. A good perceptive of the seismic behavior of these important structures is necessary in order to meet up safety objectives while containing construction and maintenance. In this paper, we studied circular and rectangular overhead water tanks with different water levels. The static and dynamic analyses of time history were performed on the tanks. The different cases depending on water levels as 0%, 25%, 50%, 75%, and 100% filled were studied. In this project base shear variation, time period for different mode shapes, time history for different earthquakes were calculated by using SAP2000.