Interstate migrant construction workers constitute a critical segment of Kerala's urban and semi-urban labour force, yet their exposure to crime, exploitation, and unsafe living conditions remains systematically underaddressed. This article examines the crime vulnerability and safety conditions of interstate migrant construction workers in Malappuram District, Kerala, through a social welfare and public administration lens. Drawing on secondary sources, policy documents, and existing empirical literature, the study adopts a descriptive and analytical approach to map the structural conditions that produce vulnerability among this population. The findings reveal that unsafe housing, hazardous worksites, language barriers, weak grievance mechanisms, and fragmented welfare administration combine to create conditions in which exploitation, wage theft, harassment, and physical insecurity are pervasive but largely invisible. The article argues that crime vulnerability among migrant workers cannot be reduced to direct criminal victimisation; it must be understood as a consequence of institutional neglect and administrative fragmentation. The study concludes that a rights-based welfare framework integrating labour inspection, local governance coordination, police responsiveness, and community outreach is essential for meaningful protection of interstate migrant workers in Malappuram District and Kerala more broadly.