This book explores the nexus between disaster management and national security in Nigeria with the aim of ascertaining if there is any strategic linkage between the two and proffering policy recommendations. This was necessitated by the concern to highlight the significance of management as a pivotal aspect of Nigeria's national security concern. The book is exploratory and descriptive analytical in approach. Predicated on systematic exegesis of secondary sources, the book assumes that emergency management is integral and indispensable to Nigeria's national security. This assumption is in line with the prevailing global standpoint that disaster management is a crucial development issue that holds strategic implications for national security of states. In view of the rising incidence, prevalence, diversity, and impact of disaster in contemporary Nigeria, as well as the country's appreciable vulnerability thereto, the book posits that disaster occurrences constitute a veritable threat to Nigeria's national sustainability. This implies that success or failure of disaster management in Nigeria holds corresponding implications for the sustenance of her national security.