Flood is one of the natural disasters occurring due to excessive rainfall and inappropriate stream arrangements. It is important to prepare flood risk maps appropriately to prevent loss of life and property. In this study, areas under flood risk in the Kınıklı Stream Basin were determined with MIKE 21, 2D hydrodynamic model, for 5-, 50-, 200-, and 500-year recurrence flows. At the junction of the Kınıklı Stream main branches and the outlet of the basin, the flood water levels were read at four important points, and the areas at risk were determined. The areas under flood risk were overlapped with the 1/1000 scaled zoning maps and the sizes of the settlements that would be affected by the flood were calculated for each recurrent flow. For all recurrent flows, the areas that will be most affected by the flood were found to be residential areas. When the residential areas that will be affected by the flood are examined, an increase of approximately 70% was observed for the 500-year flow compared to the 5-year flow.