Cities are a gathering place for human resources and the centers of political decision-making, administrative, military, and financial and intellectual capital are based in cities; for this reason, cities are responsible for a very important role in managing wars due to facilities and welfare services. In addition, urban planning has huge problems in some cities, so that these cities will suffer from disruptions in water supply systems, power distribution and city gas in the event of crisis and

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... rocket attacks. In the meantime, planning on the basis of passive defense approach can to a large extent compensate the shortcomings resulting from the incorrect planning. The aim of this study was to assess the vulnerability of urban infrastructure in Gorgan city. To this end, descriptive-analytical method, field studies and subsequently, zoning and overlay information layers (Index Overlay) have been used in GIS spatial analysis software. Using two criteria including building density and spatial distribution of critical and sensitive facilities in Gorgan city and their zoning and finally using prepared overlapping layers, it was found that the northwestern of Gorgan city is more vulnerable due to high concentration of vital facilities such as electricity Distribution Company, National Petroleum Products Distribution Company and regional water companies which requires more planned measures in the framework of passive defense.