The expansion of cyberspace and the growing reliance of society on modern technologies have led to the emergence of new forms of delinquency, known as cybercrimes. These crimes, ranging from online fraud to privacy violations and unauthorized access to data, represent serious threats to individual and social security. One of the most effective strategies for preventing such crimes is to enhance citizens’ legal awareness. Awareness of cybercrime-related laws not only reduces the risk of victimization but also discourages individuals from committing criminal behaviors in cyberspace. The aim of this study is to analyze the impact of legal knowledge on reducing cybercrimes and to propose preventive measures based on Iranian law and international instruments. The research method is descriptive-analytical, relying on library and documentary studies. Findings reveal that raising legal awareness through public education, media, and official institutions can serve as an effective tool for social prevention and, alongside penal measures, contribute to reducing cybercrime. The novelty of this paper lies in addressing both legal and social dimensions of prevention, showing that strengthening users’ legal knowledge is a key step toward ensuring cybersecurity.