Smoking kills more than 7 million people worldwide every year. That figure includes roughly 1.6 million nonsmokers who die from breathing in other people’s smoke. In the United States alone, cigarette smoking accounts for more than 480,000 deaths annually, making it the leading cause of preventable death in the country.
The Global Death Toll
The World Health Organization calls tobacco one of the biggest public health threats the world has ever faced. Beyond the 7 million annual deaths, tobacco use causes widespread disability and long-term suffering from chronic diseases. To put that number in perspective, tobacco kills more people each year than HIV, malaria, and tuberculosis combined.
Life expectancy for smokers is at least 10 years shorter than for nonsmokers. That gap reflects the cumulative damage smoking does to nearly every organ in the body, driving up rates of cancer, heart disease, stroke, and chronic lung conditions like emphysema.
How Smoking Kills: The Major Diseases
Smoking doesn’t cause death in one way. It raises the risk of dozens of diseases, but three categories account for the vast majority of tobacco-related deaths. Cardiovascular disease, including heart attacks and strokes, is the single largest killer. Smoking damages blood vessel walls, accelerates the buildup of fatty deposits in arteries, and makes blood more likely to clot. Even people who smoke fewer than five cigarettes a day have measurably higher heart disease risk.
Cancer is the second major pathway. Lung cancer is the most well-known link, but smoking also causes cancers of the throat, mouth, esophagus, stomach, pancreas, kidney, bladder, and cervix. About 80% of lung cancer deaths trace back to smoking. Chronic respiratory diseases round out the three main categories. Smoking progressively destroys the tiny air sacs in the lungs, making it harder to breathe over years and decades. The resulting conditions, primarily chronic obstructive pulmonary disease, cause slow, debilitating declines in lung function.
Secondhand Smoke’s Toll on Nonsmokers
Of the 7 million annual deaths, approximately 1.6 million are people who never smoked themselves. Secondhand smoke causes coronary heart disease and lung cancer in adults, and it raises the risk of sudden infant death syndrome, ear infections, and asthma attacks in children. There is no safe level of exposure.
In the United States, deaths from secondhand smoke exposure have dropped by more than 50% since 2000, falling from over 40,000 to fewer than 20,000 annually. That decline reflects smoking bans in workplaces, restaurants, and public spaces. But the benefits haven’t been shared equally. Reductions have been slower among Black, Hispanic and Latino, and other racial and ethnic minority groups compared to white populations.
Who Is Hit Hardest
Smoking rates and smoking-related deaths are not evenly distributed across the population. In the United States, smoking prevalence is nearly twice as high among adults living in poverty compared to those who are not. It is more than four times higher among adults without a high school diploma compared to college graduates. American Indian and Alaska Native adults have the highest smoking rates of any racial or ethnic group, with one in four smoking cigarettes as of 2020.
These disparities in smoking rates translate directly into disparities in death. Smoking causes one in five deaths among Black and white Americans, and about one in 10 deaths among Hispanic or Latino people. Lung cancer incidence and death rates are highest among Black men. Among women, American Indian and Alaska Native women have the highest lung cancer rates. Chronic obstructive pulmonary disease rates are also highest among American Indian and Alaska Native adults.
Secondhand smoke exposure follows similar patterns. Black adults experience more than double the secondhand smoke exposure of white and Mexican American adults. Adults without a college degree and families below the federal poverty level face more than twice the exposure of their higher-income, college-educated counterparts.
The Economic Cost
Smoking’s damage extends beyond health. A comprehensive analysis published in Tobacco Control estimated the total global economic cost of smoking at $1.85 trillion (in purchasing power terms) in 2012, equivalent to 1.8% of the world’s entire economic output. Direct healthcare spending on smoking-related diseases accounted for $467 billion of that total, representing 5.7% of all global health spending. The remaining $1.4 trillion came from lost productivity due to disability and premature death.
Regional Trends and Projections
While global smoking rates have been declining overall, progress varies dramatically by region. The WHO European Region, which covers 53 countries across Europe and Central Asia, is projected to remain the worst-performing region in the world for tobacco use through 2030. Tobacco already causes over 1.1 million deaths from noncommunicable diseases in that region each year, and without significant policy changes, that trajectory will hold.
Europe is also the only WHO region not expected to meet the global target of a 30% reduction in tobacco use among women by 2025. Current projections show only a 12% reduction between 2010 and 2025, roughly a third of the goal. These trends underscore that while smoking rates are falling in many high-income countries, the epidemic is far from over, particularly in regions where tobacco control policies have been slower to take hold.