Islamabad lies at the foothill of Margalla hills and adjacent to Rawalpindi. The study covers an area of approximately 76.87 square kilometers. The thesis presents the 3 dimensional models of the subsurface geological data obtained from borehole records. RockWorks v.2002 was used to model and create images describing the stratigraphy of the study area. Analysis of cross sections and three dimensional models created by RockWorks v.2002 allows texturally distinct hydrostratigraphic units to be identified. The study defines the hydrogeologic framework including mapping the extent and thickness of aquifer and confining units of groundwater system. The water flows from north to south as the topography changes from slopes to plane. Aquifer 3 of the study region was studied in detail and it porosity, permeability and moisture content were discussed. The eastern and western sides of the aquifer 3 has varying thickness, porosity, permeability and moisture content which can determine the more precise region for recharge and discharge.