Heart disease (also called cardiovascular disease or ischaemic heart disease) is what kills men the most worldwide and in most countries.
Here’s the current picture based on the latest reliable global and national data (mostly 2021–2024 figures):
Worldwide (global level)
The top killers overall (both sexes) are very similar for men, but men tend to die earlier and at higher rates from most of these:
Ischaemic heart disease (heart attacks, coronary artery disease) — the #1 killer globally (~13% of all deaths)
Stroke
Chronic obstructive pulmonary disease (COPD)
Lower respiratory infections (pneumonia etc.)
Alzheimer’s disease and other dementias
Lung cancer, trachea, bronchus cancers
Diabetes
Kidney diseases
Cirrhosis of the liver
Road injury / other injuries
Men usually have higher rates than women for heart disease, lung cancer, liver disease, injuries/accidents, and suicide.
In the United States (most recent data, 2023–2024)
For men specifically the leading causes are:
Heart disease (~23–24% of male deaths)
Cancer (especially lung, prostate, colorectal) (~20%)
Unintentional injuries / accidents (car crashes, overdoses, falls etc.) — much higher in men than women (~9%)
Stroke
Chronic lower respiratory diseases (COPD etc.)
Diabetes
Suicide (very high in men, often ranks higher than in overall lists)
Chronic liver disease / cirrhosis
Kidney disease
COVID-19 (dropped a lot since peak pandemic years)
Important age differences (what kills men at different life stages)
The #1 cause changes dramatically depending on age:
Ages 15–44 → Unintentional injuries / accidents (including drug overdoses, car crashes) is usually #1
Suicide and homicide also rank very high in this group.
Ages 45–64 → Cancer often #1 or very close, followed by heart disease
Ages 65+ → Heart disease clearly #1, then cancer, stroke, etc.
Key takeaways
Heart disease remains the single biggest killer of men across most of adult life and worldwide.
Preventable / lifestyle-related causes dominate the list: smoking, poor diet, lack of exercise, heavy alcohol, obesity, uncontrolled blood pressure/cholesterol → these drive heart disease, many cancers, COPD, diabetes, and liver disease.
Men die more from “external” causes — accidents, suicide, homicide, overdoses — especially under age 50.
If you’re asking for personal reasons (your age group, country, or specific risk factors), give me more details and I can narrow it down further.