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The subsurface materials are classified into four subsurface materials according to the resistivity values ranges: water-saturated zones, topsoil, weathered bedrock, and fresh bedrock. The results show the resistivity values ranging from 1Ùm to 20000Ùm. Apparent resistivity values undergo an inversion process using RES2DINV software to produce the electrical resistivity topography model. The instrument used for this research is an automated multi-electrode resistivity meter, ABEM Terrameter SAS 4000 system. The voltage reading is measured between two active potential electrodes alternatively. The electrical resistivity method measures the resistivity distribution by injecting a small current into the ground through two current and potential electrodes, respectively. The geology of the research area is underlain by igneous rock with a centrally located granitic range running in a north-south direction with low-lying elevations ranging from 5 meters to 20 meters above sea level. Nine resistivity survey lines are conducted within the research area in USM. This research aims to evaluate the delineation of potential groundwater zones using 2D electrical resistivity imaging in Universiti Sains Malaysia, Penang Island, Malaysia. Therefore, geophysical methods were applied to obtain subsurface information to determine and classify the subsurface materials using selected geophysical properties. However, there has also been unsuccessful groundwater exploration due to limited subsurface information. The extracted groundwater is an alternative water supply in these sectors. Groundwater exploration is increasing in demand, including use in the domestic, industrial and agricultural sectors. Geophysics, 2D electrical resistivity imaging, groundwater exploration, granitic Abstract School of Physics, Universiti Sains Malaysia, 11800 USM Penang