Vulnerable urban spaces are among the spaces that endanger citizens' psychological and social security by creating conditions for the formation and occurrence of criminal behaviors due to inappropriate physical and social characteristics. While dealing with related concepts and definitions, this research seeks to evaluate and zone defenseless urban spaces in region 1 of Tabriz. The type of exploration of this mixed method research is functional, fundamental, and in terms of purpose, the research uses exploratory and applied methods, and is based on documentary and field data.The statistical population of the study includes the physical space of neighborhoods in region 1 of Tabriz. The data obtained by the effective components in creating defenseless spaces are analyzed using of GIS software and weighting methods; the final overlap of layers is used to zoning neighborhoods in terms of defenseless spaces. The findings show that Valiasr and Golkar neighborhoods have the least defenseless spaces, and Mallazeinal, Seylab Qoshkhaneh, Baghmishe Ghadim, Polsangi, Yousefabad, and Idelou neighborhoods have the least defenseless areas in the study area, respectively. In addition, as we move from the eastern areas to the western borders of the region, defenseless spaces increase, their quality decreases, and socio-physical vulnerabilities and social security of citizens are more affected. Inadequate lighting , barren and ruined landscapes, vegetation and dense green spaces, dead-end passages, narrow passages, and L-shaped U-shaped passages are the most important variables that affect the creation of defenseless urban spaces.The effects of these variables include poor monitoring and visibility, loneliness and darkness, poor quality of spaces and confusion, and burnout of tissues, resulting in reduced social security