Personal security is one of the many factors that must be assessed comprehensively when planning an urban competitiveness strategy. The aim of this article is to assess the competitive position of the social environment of cities in terms of security with regard to time and other competing cities. Having conducted a systemic and comparative analysis of the concepts published in the scientific literature, we analysed the concepts of sustainable cities and the social environment, reviewed the particularities of urban competitiveness, conducted research into the methods of assessing urban competitiveness, and presented an integrated assessment model (MDK) of social environment competitiveness in terms of security in the Baltic capitals. The following research methodology was used: systemic and comparative analysis of concepts and methods published in the scientific literature, statistical processing and multicriteria assessment methods. The results of the study can be used as a tool to determine the competitive position of a city in terms of time and other competing cities, a tool to identify factors that strengthen or weaken the sustainable competitiveness of cities, a tool to justify strategic decisions of cities, and a tool to determine the effectiveness of the strategic decisions taken.