Global Mortality in 2021
A snapshot of death rates, leading causes, and country rankings for 2021.
| # | Country | Death Rate | #1 Cause | Region |
|---|
COVID-19 vaccines became available in early 2021 but distribution was starkly inequitable: by year-end, over 70% of people in high-income countries had received at least one dose compared to under 10% in low-income countries. The Delta variant caused devastating waves in India, Southeast Asia, and Africa. Excess mortality estimates suggest approximately 10.8 million excess deaths in 2021, the pandemic's deadliest year. TB deaths rose for the first time in over a decade due to health service disruptions.
In 2021, data from 221 countries reveals the leading causes of death by share: cardiovascular diseases (25.8%), COVID-19 (15.7%), cancers (neoplasms) (14.9%), lower respiratory infections (3.9%), digestive diseases (3.6%). These averages reflect the cross-country mean share of total deaths and highlight the dominant mortality patterns of the era.
Compared to 2020, the most significant shifts in the global mortality profile by 2021 include: COVID-19 increased by 6.2 percentage points (from 9.4% to 15.7%); cardiovascular diseases decreased by 1.6 percentage points (from 27.4% to 25.8%); cancers (neoplasms) decreased by 0.8 percentage points (from 15.7% to 14.9%); lower respiratory infections decreased by 0.5 percentage points (from 4.4% to 3.9%). These changes reflect evolving risk factor exposures, demographic transitions, medical advances, and public health interventions across the world.
Global mortality statistics are compiled from multiple sources. High-income countries typically rely on national vital registration systems with medical certification of cause of death, while many low- and middle-income countries supplement incomplete civil registration with verbal autopsy surveys and hospital records. The Institute for Health Metrics and Evaluation (IHME) integrates these inputs using statistical modeling to produce comparable estimates across countries and years. The 'share of deaths' metric shown in the charts represents the proportion of all deaths in a given country-year attributed to each cause category, summing to approximately 100% across all causes. When comparing across years, small shifts of one to two percentage points may reflect updates in data sources, changes in diagnostic coding (such as ICD revision transitions), or improvements in modeling methodology rather than true epidemiological changes. Larger shifts — particularly those sustained over multiple consecutive years — are more likely to represent genuine trends in population health.