Railways are an integral part of transportation sector of many countries like USA, China, and India. New tracks are being laid at a fast pace as well as existing tracks are being upgraded to meet the demands of the ever-increasing population. Geosynthetics in the form of geocells can be used as a reinforcement material in railways to reduce settlements and track deteriorations which can also reduce the maintenance costs involved. Upgrading tracks require parametric studies to evaluate the effect of various properties of track components on the track system. In the present study, three-dimensional geocell reinforced tracks are modeled using Midas GTS-NX, which is a commercial finite element analysis software. The displacement and vertical stress variations for the railway tracks over clayey subgrade under applied train load were obtained using finite element analyses. The parametric studies involved variation in subgrade modulus and infill modulus to show their effects on reduction in settlements as well as vertical stresses. The comparison of the geocell reinforced model with the unreinforced model showed improvement of railway tracks using geocell. The results of parametric studies show that increase in modulus of subgrade and infill material can effectively improve the performance of railway tracks.