This research study was aimed at creating Flood Susceptibility Map (FSM) and identifying flood-prone areas that are most vulnerable to flooding using an integration method of Geographic Information System GIS, Multi Criteria Decision Making ("MCDM") with Analytic Hierarchy Process ("AHP"). The case study was conducted on one of the Afghan provinces, "Kandahar Province." This study used spatial data of all relevant factors that affect flood vulnerability. The reader of this study will be able to apply the method to every region to identify flood-prone areas that are most vulnerable to flooding.