Insecurity in Nigeria manifested through insurgency, banditry, kidnapping, and violent crime, which has become one of the country’s most pressing governance challenges. While youth unemployment is often viewed as an economic issue, its far-reaching implications for national security remain inadequately examined. This study investigates the relationship between youth unemployment and national security in Nigeria. The specific objectives are to identify the major causes of youth unemployment and assess its effects on national security. Anchored on Abraham Maslow’s Human Needs Theory, the study adopts a qualitative research design, drawing data from interviews with representatives of non-governmental organisations, police officials, and community-based organisations, as well as analysis of relevant policy documents and reports. Findings reveal that unmet basic and psychological needs among unemployed youth contribute to frustration, social alienation, and increased vulnerability to criminal recruitment and violent extremism in the country. The study concludes that addressing youth unemployment through inclusive economic policies and targeted empowerment programs is essential for promoting sustainable national security in Nigeria.