In this study, the consequences of urbanization were identified and their impact on the safety of urbanized areas and the well-being of residents in such areas were justified. As a result of the research, the consequences of urbanization were determined and characterized from the perspectives of ecological, economic, infrastructural, social, and humanitarian environments. These identified consequences require immediate mitigation, as they pose threats to both the safety of residents and, overall, the safety of urbanized areas and national security as a composite of its components - ecological, economic, humanitarian, social, etc. The impact of ecological, economic, social, humanitarian, and infrastructural consequences of urbanization poses threats to the safety of urbanized areas, the well-being of city dwellers, and national security in general. Negative impacts of the identified consequences are traced for individual components of national security. Economic, social, and infrastructural consequences constitute threats to economic and socio-humanitarian security, while ecological consequences pose risks to ecological and food security. It is pertinent to note the close interconnection of components of national security, which is evident in their mutual influence. For instance, consequences of economic nature identified by us, such as urban poverty, pose a threat to economic security and, simultaneously, pose a threat to social security, manifested in the exacerbation of social inequality and stratification, as well as the intensification of health problems in cities. These consequences also pose a threat to ecological security as one of the factors exacerbating waste issues and, consequently, deteriorating the sanitary-epidemiological situation. Key words: state policy, urbanization, urbanized territories, public administration, state security, national security, consequences, safety, well-being, ecological impact, economic impact, infrastructural impact, social impact, humanitarian impact.