One of the most important goals of geodesy is to determine the geoid modelwith an accuracy of ±1 cm. This accuracy has not been achieved in manyregions of world yet. This is partly due to the unknown density of thetopographic masses of the regions. In general, the density value is takenas 2.67gr/cm³, which is a global average. However, the average densityvalue differs from the actual density of the topographic masses byapproximately %10 to %20 per cent. To achieve the optimum geoidaccuracy mentioned above, it is necessary to take into account the densityvariation in the determining gravimetric geoid as well. One of the ways toachieve the density value is to use global, regional and local crust models.The local density model produced for the region of interest is the mostconvenient way for the modeling the topographic masses. According to theprevious studies, the effect of density on the geoid is significantparticularly in mountainous regions. The density values obtained fromglobal and regional models in our study area differs approximately ±%10percent from the global average. It was investigated to what extent thisdifference affects gravimetric regional geoid determination in KonyaClosed Basin.