World Health Organization (WHO) Mortality Database Overview The WHO Mortality Database is a global collection of cause of death statistics compiled annually from the civil registration and vital statistics systems of WHO Member States. It records the number of deaths and age standardised death rates broken down by country (or sub national area), year, sex, five year age group and International Classification of Diseases (ICD) code typically at the four digit ICD 10 level. The dataset spans more than seven decades, with data available from 1950 to the most recent year for every country that meets a minimum 65 % completeness threshold and provides fully coded cause of death information. The database is produced by the World Health Organization and is intended to support comparative epidemiological research, monitor mortality trends, evaluate public health interventions, and inform national and international health policy planning. Users range from academic investigators studying disease burden to ministries of health tracking progress toward Sustainable Development Goal 3 targets. Key features that distinguish the WHO Mortality Database include: (1) worldwide coverage of over 190 countries and territories; (2) long term continuity allowing cross generational analyses; (3) granular cause of death detail linked to ICD 10 codes; (4) an interactive portal with visualisation tools and bulk download of ASCII formatted files for integration into statistical software; and (5) documented data quality checks that flag incomplete or inconsistent registrations.