The Gravity recovery and climate experiment (GRACE and GRACE FO) satellite mission is veryrnimportant to monitor Groundwater storage variation where there is a limitation of in siturndata and limit of policies for sharing data like East Africa. In this study, GRACE and GRACE FOrnand GLDAS data were carefully processed and filtered by Gaussian smoothing methods tornreduce noise. This study correlates GRACE derived TWSA data with water balance (P-ET-R)rnover 2008 to 2019 (means, twelve years) period and strong correlation(r = 0.75, rmse =rn2.198) were obtained. GLDAS land surface model is used to get soil moisture and plantrncanopy surface water that reduced from GEACE/GRACE FO derived TWSA to obtainedrnGroundwater storage change of the study area. In addition to that, Global land datarnassimilation system version 2.2 groundwater storage change was used. To analysisrnGroundwater storage change, the study area was classified according to river basin in thernstudy area. Therefore, three basins were considered for the area and correlation coefficientsrnwere individually determined to measure the strength between the two data analyzed.rnAccordingly, GWSA of GRACE-GLDAS and GLDASv2.2 have a correlation coefficient value ofrn0.88, 0.975 and 0.906 for Nile, Jubba-Shebelle, and Lake Rudolf basins respectively. Thernlargest yearly ground water depletion occurs in February, 2008 to February, 2010 duringrnmillennium drought by average rate of -9.2 mm per year in Jubba Shebelle basin andrnFebruary, 2009 to June, 2010 by -17.98 mm per year in Nile basin and June, 2008 tornDecember 2009 by -12.16 mm year for Lake Rudolf basins due to decreasing of rainfall.