Aim of this study is to determine physical, mechanical properties of silty clayey and organic soil in Kayseri region and their settlement analysis when elastic or rigid foundations constructed. Organic soil generally has high water content, high compressibility, low shear strength and long term settlement due to these characteristics this kind of soils may be problematic and unsuitable for structures. Some conventional laboratory tests were done in order to get soil parameters such as moisture content, liquid limit, plastic limit and specific gravity. By considering these issues analysis of the consolidation and settlement characteristics of this soil hence choosing the suitable foundation type is crucial for construction purposes. Settle 3D software that one of the geotechnical engineering based finite element analysis (FEA) in conjunction with an elastic soil model is used to identify the effect of variables at design stage. These variables are Young’s modulus, groundwater table, coefficient of consolidation and time. In addition, the effect of circular and rectangular loading was performed in the calculations of immediate settlement, primary consolidation and secondary consolidation. Time dependent consolidation analyses were performed up to 50 year time period. The results have indicated that pressure dissipation under the rigid foundations remains linear on the other hand dissipation beneath flexible footings remains non-linear. Also, settlement under the flexible footings increased from edge to the center but under the rigid footings the settlement is uniformly distributed.