The purpose of the research was to investigate the scale of crime by foreign nationals in Switzerland in the context of the effectiveness of the assumptions of the migration policy of that state in the area of security. Materials and methods: The research uses literature sources and statistical data on the crime of foreign nationals in Switzerland and its migration policy. The author used qualitative research methods, including the query of literature and strategic documents (using the content analysis technique) and the analysis of statistical data (using the desk research technique). Results: In the context of the three analysed factors, the following trends can be observed: steadily declining crime in Switzerland; the relatively constant level of crime by foreign nationals, especially since 2018; constant, although relatively mildly growing, percentage of foreign nationals’ crime in the overall crime scale. Conclusions: In the context of the assessment of the effectiveness of the implementation of the assumptions of Switzerland’s migration policy in the area of security, it should be noted that the relatively constant level of the crime rate of foreign nationals, despite their constantly growing population, proves the optimality of these assumptions and their highly effective implementation.