Göksu Delta is an important wetland where the Göksu River reaches to sea in the eastern of the town Tasucu-Ice1. The delta is classified as a Wetland of International Importance according to the Ramsar Convention on Wetlands of International Importance. In the Göksu Delta area, urban and agricultural expansions have caused an ever-growing need for fresh water. In this study, the flow of groundwater was determined through a threedimensional model developed by the finite-difference program MODFLOW. MODPATH was calculated the advective pathlines of the water particles. The result of steady-state flow simulation show that the groundwater flow to south and east directions as it expected. Movement in the uplands is greatest in the upper sands with maximums of about 3.4 10-5 m/s. The types of groundwaters from alluvial aquifer are Ca-Mg-HCO3, but in the region where sea water intrusion is occured it changes and the Na and Cl ions are added to groundwater. The similar occurence can be observed in the groundwater from the limestone aquifer. The types of groundwater are Ca-HCO3 or Ca-Mg-HCO3 and they change to Ca-NaMg-HCO3-Cl in the vicinity of seawater intrusion regions