Groundwater is an important source of water in both rural and urban settlements in Nigeria for various water needs.  This resource is invisible and often there is very limited data available on its physical distribution and aquifer characteristics.  Nigeria's geology is made up of sedimentary basins and Basement Complex roughly in equal proportions.  While groundwater exploration in the sedimentary basins is not tedious, groundwater exploration in the Basement Complex is often difficult, because of low storage and spatial variability in groundwater occurrence.  This study is aimed at delineating potential groundwater zones using geo-electrical survey method in Mando/Rigasa area, Kaduna, northwestern Nigeria.  Well inventory was carried out in 45 open hand-dug wells.  Thirty-nine Schlumberger configured Vertical Electrical Sounding (VES) stations spread across the study area were used to determine subsurface conditions.  The geology of the area is predominantly granite-gneiss with quartzite.  Four geoelectrical layers were delineated which are the top soil, sandy and gravelly weathered layer, the partially weathered/fractured layer and the fresh basement. Isoresistivity maps generated from the resistivity value distributions at depths of 10 m, 25 m and 50 m from the ground surface, as well as isopach maps drawn for the thicknesses of the overburden layer and aquifer zone from the interpreted field VES data indicate that the areas around the north/northwest, central and southeastern parts have relatively higher groundwater potential.  Areas around southwest and northeast are interpreted to have moderate groundwater potential.  The areas considered to have high and medium groundwater potential are hence recommended for further investigations before siting of boreholes.

KEYWORDS: Groundwater, Geoelectrical Survey, Mando/Rigasa, Isoresistivity, Isopach.