Globally, Ischaemic Heart Disease (Coronary Artery Disease) is the number one killer, responsible for more deaths than any other condition, though Dementia (including Alzheimer's) is rising rapidly and is a leading cause in many countries like Australia. Cardiovascular diseases (CVDs), which include heart attacks and strokes, remain the world's leading cause of death, killing millions annually, with increases seen in many developing nations.
The number one killer in the world is cardiovascular disease (CVD), including heart disease and stroke, responsible for about one-third of all global deaths, claiming nearly 18-20 million lives annually, and remains the leading cause across all regions, according to WHO and World Heart Federation. While COVID-19 caused significant deaths in recent years, CVD has consistently held the top spot for decades, with increases seen globally, especially in younger populations.
Globally, Ischaemic Heart Disease (Coronary Artery Disease) remains the world's biggest killer, but regionally, Dementia (including Alzheimer's) has recently become the leading cause of death in countries like Australia, surpassing heart disease for females and overall, while heart disease leads for males. Other top causes globally include stroke, respiratory infections, lung cancer, and chronic obstructive pulmonary disease (COPD).
The 10 leading causes of death in 2023 in ranked order were: Diseases of heart; Malignant neoplasms; Accidents (unintentional injuries); Cerebrovascular diseases; Chronic lower respiratory diseases; Alzheimer disease; Diabetes mellitus; Nephritis, nephrotic syndrome and nephrosis; Chronic liver disease and cirrhosis; ...
Taken together, heart diseases and cancers are the cause of every second death. In red are infectious diseases, which are responsible for around 1-in-7 deaths. These include pneumonia, diarrheal diseases, tuberculosis, HIV/AIDS, and malaria. A smaller share – around 4% – was from neonatal and maternal deaths.
According to the American Heart Association's 2025 Heart Disease and Stroke Statistics Update, heart disease remains the leading cause of death in the U.S.
Heart disease is the leading cause of death for men in the United States, accounting for 25 percent of all male deaths. Various factors, including smoking, high cholesterol levels and obesity, can cause heart disease.
The Heaviest Hitters
New Orleans has the highest homicide rate among major U.S. cities, at 46 homicides per 100,000 people. Per capita rates reveal a different picture than total homicides, with some highly populated cities ranking lower despite high absolute numbers.
It basically is an app where you feed in all your health information, personal information, social information — any fact about you — and it promises to tell you your death date." Ethicist Art Caplan discusses the potential accuracy of a death clock app and the need for related health counseling.
Death rate - Country rankings
The average for 2022 based on 196 countries was 8.24 deaths per 1000 people. The highest value was in the Central African Republic: 55.13 deaths per 1000 people and the lowest value was in Qatar: 0.93 deaths per 1000 people.
In 2023, the life expectancy at birth was 78.4 in the United States, a 0.9 year increase from 2022. Although American life expectancy has been on a general increase, from 73.7 in 1980 to 78.4 in 2023.
Hypertension, or high blood pressure, is often called the "silent killer" for good reason.
Global Births Per Day
Every day, around 370,000 babies are born worldwide. That's based on the much larger number of average worldwide births per year, reported by Our World in Data to be around 135 million. If you divide 135 million by 365, you get about 370,000.
Immediate cause of death refers to the disease, failure of injury whose symptoms cause the person to die. However, the actual mechanism of death, e.g. cardiac arrest, are not regarded as immediate causes of death.
Globally, Ischaemic Heart Disease (Coronary Artery Disease) is the number one cause of death, responsible for a significant portion of deaths, with cardiovascular diseases (CVDs) as the leading overall killer, followed by cancer, according to the World Health Organization (WHO). In the United States, heart disease also remains the top killer, while dementia and Alzheimer's are leading causes in places like Australia, with figures varying slightly by country and year.
The Shaanxi Earthquake killed 830,000 people according to Chinese records, which would make February 2, 1556 (or January 23 depending on your calendar of choice) the deadliest day ever in terms of total human deaths.
The plague that killed up to 75% of the population in some areas was the Black Death, a devastating pandemic (1346–1353) caused by the bacterium Yersinia pestis, which wiped out huge portions of Europe, Asia, and Africa, with some cities losing as many as three-quarters of their inhabitants in mere days.
The world's biggest killer is ischaemic heart disease, responsible for 13% of the world's total deaths. Since 2000, the largest increase in deaths has been for this disease, rising by 2.7 million to 9.0 million deaths in 2021.
Heart disease is America's No. 1 killer. Your gift now to the American Heart Association will help save lives by funding pioneering medical research, education and prevention information and more. Your donation is secure.
Leading Causes of Death
Dementia (including Alzheimer's disease) is now Australia's leading cause of death overall, closely followed by ischaemic heart disease, with the gap narrowing as the population ages; however, coronary heart disease remains the top killer for males, while dementia leads for females. Other major causes include cerebrovascular disease (stroke), lung cancer, and chronic lower respiratory diseases (COPD).
Despite Strides in Medical Advances, Heart Disease Remains the World's #1 Killer. September 29th, 2025, marks the 25th anniversary of World Heart Day, an initiative to raise awareness, inspire action, and celebrate heart health.