Diabetes kills approximately 3.4 million people worldwide each year, according to the International Diabetes Federation’s 2024 estimates. That works out to roughly one death every nine seconds. In the United States alone, diabetes is listed as the underlying cause of death on about 94,000 death certificates annually, making it the country’s seventh leading cause of death. But those official numbers almost certainly undercount the real toll.
Global Deaths From Diabetes
The World Health Organization reported 1.6 million deaths directly caused by diabetes in 2021. That figure, however, only captures cases where diabetes itself was identified as the primary killer. It doesn’t include the hundreds of thousands of deaths from conditions that diabetes fuels. An additional 530,000 kidney disease deaths were attributed to diabetes that same year, and elevated blood sugar contributes to roughly 11% of all cardiovascular deaths worldwide. When those downstream effects are included, the total climbs to the 3.4 million figure the IDF now cites.
Nearly half of all diabetes deaths, 47%, occur in people under 70. That’s a striking number for a disease many think of as a condition you manage into old age.
U.S. Deaths by Age Group
In the United States, the CDC reports 94,445 deaths per year with diabetes as the underlying cause, a rate of about 27.8 per 100,000 people. The burden falls overwhelmingly on older adults, but younger people are far from immune.
- Ages 15 to 44: 4,467 deaths
- Ages 45 to 64: 26,209 deaths
- Ages 65 to 74: 27,958 deaths
- Ages 75 and older: 44,506 deaths
More than 30,000 of these deaths occur in people under 65, an age range where most causes of death are still relatively uncommon. The 45 to 64 group alone accounts for more than a quarter of all U.S. diabetes deaths.
Why the Real Number Is Higher
Official death counts significantly underestimate how many people diabetes actually kills. The reason is straightforward: when someone with diabetes dies of a heart attack, stroke, or kidney failure, the death certificate typically lists that specific event as the cause of death rather than the diabetes that drove it. In one CDC study of patients known to have diabetes, only 48% had diabetes mentioned anywhere on their death certificate. Just 36% of those had it listed as the underlying cause.
This means that for every diabetes death counted in official statistics, there’s likely at least one more that goes unrecorded. The gap between the WHO’s direct-cause figure of 1.6 million and the IDF’s broader estimate of 3.4 million reflects this undercount on a global scale.
Type 1 vs. Type 2 Mortality
Type 2 diabetes accounts for the vast majority of diabetes deaths simply because it represents about 90% of all cases. But Type 1 diabetes carries its own serious risks, particularly for men. Research published in The Lancet found that men with Type 1 diabetes had statistically higher mortality than men with Type 2 at every age of diagnosis. For women, the picture was more complex: mortality rates between the two types were similar when diagnosis happened before age 60, and women diagnosed with Type 2 between ages 20 and 39 actually had higher mortality than those with Type 1.
Both types shorten life expectancy substantially when diagnosed young. Type 2 diabetes diagnosed during adolescence is associated with roughly 12 years of lost life expectancy. Type 1 diagnosed between ages 21 and 30 results in about 10 years lost. Even when diagnosed later in life, the impact is measurable. A study across 23 high-income countries found that a 50-year-old man with Type 2 diabetes loses about 4 years of life expectancy on average, while women lose about 3.6 years.
How Diabetes Actually Kills
Diabetes rarely kills through blood sugar alone. The danger lies in the damage that persistently high blood sugar inflicts on blood vessels and organs over years. Cardiovascular disease is the leading killer: heart attacks and strokes account for the largest share of deaths among people with diabetes. Kidney failure is the second major pathway. The kidneys filter blood constantly, and years of elevated sugar gradually destroys the tiny blood vessels that make filtration possible. Infections, nerve damage leading to amputations and complications, and diabetic coma round out the list, though these are far less common causes of death than heart and kidney disease.
This is exactly why diabetes deaths are so undercounted. A person whose kidneys fail after 15 years of poorly controlled blood sugar may have “renal failure” on their death certificate with no mention of the diabetes that caused it.
Years of Life Lost
Beyond raw death counts, researchers measure the impact of diabetes through years of life lost, which captures how much earlier people die compared to the general population. Across high-income countries, a 20-year-old man diagnosed with Type 2 diabetes loses anywhere from 2.5 to nearly 13 years of life expectancy depending on the country. For 20-year-old women, the range is 3.1 to 11.2 years.
There is some good news in the trend lines. The U.S. saw the largest decrease in years of life lost for young men with Type 2 diabetes between 2009 and 2015, a drop of 2.7 years, likely reflecting better treatments and management. But progress is uneven. Some countries, including Hong Kong, saw years of life lost increase during the same period. The global rise in diabetes prevalence, particularly in younger populations, means the total death toll is still climbing even as outcomes improve for individuals who receive good care.