How Americans Die at Every Age: Sudden Deaths vs. Long Illnesses, 2004–2024

Disclaimer: General educational research only — not legal, medical or financial advice. Figures are from CDC National Center for Health Statistics death certificate files. What your family needs depends on your state’s laws, your health and the documents you have signed, so talk with an estate planning attorney about your own plan.

Estate Planning Data & Research → How Americans die by age

Most people put off a will because they picture a far-off death that comes with warning: a diagnosis, time to get affairs in order, a last conversation with the lawyer. CDC death certificates show how often that picture is wrong, and that the answer depends heavily on age.

The CDC’s National Center for Health Statistics (NCHS) puts every U.S. death certificate into a public file each year. We tallied all 3,072,666 deaths of U.S. residents in 2024, and every year back to 2004, by age, underlying cause and every condition listed on the certificate.

The pattern is stark. For adults who died between 25 and 44 in 2024, 51.5% of deaths came from injuries, drug overdoses, suicides and homicides: causes that usually strike with no medical warning at all. For people who died at 85 or older, almost the opposite is true. Only 3.4% died from those causes, and dementia was listed somewhere on 24.6% of their death certificates, which usually means years in which the person could not sign legal papers.

So the plan you need depends on the age you are now. Younger adults need the documents that work the day after a sudden death: a will, a guardian named for children and current beneficiary forms. Older adults need those plus the documents that work during a long decline: a durable power of attorney, a health care proxy and often a trust, all signed while they still have the capacity to sign.

If you are deciding between a will and a living trust for your family, see whether you need a will, a living trust or both: Trust vs. will: which one does your family need?

Key findings

• About 1 in 4 deaths happens before 65. In 2024, 731,009 Americans (23.8% of all deaths) died before their 65th birthday. That share was 26.8% in 2004.
• Before 45, half of deaths are sudden. Of 155,257 deaths at ages 25 to 44 in 2024, 79,922 (51.5%) came from external causes: drug overdoses (22.1%), suicide by other means (9.8%), transportation accidents (9.2%), homicide (5.8%) and other injuries. In 2004 the share was 40.7%. It peaked at 55.7% in 2023.
• Drug overdoses killed more adults 25 to 44 than any other single cause. They caused 34,247 deaths in that age group in 2024, more than cancer (15,242) and heart disease (15,118) combined.
• Most people who die in the prime parenting years are not married. Of 313,027 people who died at ages 25 to 54 in 2024, only 30.4% were married. 48.0% had never married, 18.2% were divorced and 2.0% were widowed. In 2004, 42.5% were married. Without a will, a state’s default rules decide who inherits and who asks to raise any children.
• Midlife deaths usually come with a diagnosis, but not always. At 45 to 64, cancer caused 25.4% of deaths and heart disease and stroke 24.1%. Still, 14.7% of deaths in that group (75,896) came from injuries, overdoses, suicides and homicides.
• After 65, long illnesses dominate. Cancer, dementia, Parkinson’s disease, chronic lung disease, kidney and liver disease and diabetes caused 42.5% of deaths at 65 and older. Injuries and other external causes caused 3.9%.
• Dementia appears on 1 in 4 death certificates at 85 and older. Dementia (Alzheimer’s disease or another dementia) was listed somewhere on 367,388 death certificates of people 65 and older in 2024 (15.7%), and on 218,811 (24.6%) at 85 and older. For 145,607 of the 65-and-older deaths, dementia was a contributing condition rather than the underlying cause, so cause-of-death rankings undercount it.
• Women are more likely to die with dementia. 19.4% of women who died at 65 or older had dementia listed on the certificate, compared with 11.8% of men.

How Americans die, by age (2024)

Each row is the share of deaths in that age group. The external-cause column includes drug overdoses, which also have their own column. Dementia “listed anywhere” counts every certificate where Alzheimer’s disease or another dementia was the underlying cause or a contributing condition, so it overlaps the other columns.

Two lines cross as people age. The share of sudden external deaths falls from 63.7% at 25 to 34 to 3.4% at 85 and older. The share of deaths with dementia on the certificate rises from almost zero to nearly a quarter. Cancer peaks in the late 60s and early 70s (28.9% at 65 to 74), and heart disease and stroke become more common with every decade.

Sudden, slow or in between: a planning view

Death certificates do not record how much warning a person had. But causes of death do fall into rough groups. We sorted each death by its underlying cause into four groups:

• Sudden external causes: accidents (including crashes, falls and accidental overdoses), suicides, homicides and injuries of undetermined intent. These usually come without any medical warning.
• Illnesses that usually follow a diagnosis: cancer, Alzheimer’s disease and other dementias, Parkinson’s disease, chronic lower respiratory disease (such as COPD), kidney disease, chronic liver disease and diabetes. These usually involve months or years of known illness, although the final decline can still be quick.
• Heart disease and stroke: these can strike without warning (a heart attack or a major stroke) or end a long illness such as heart failure. The certificate data cannot tell the two apart.
• All other causes: infections, pneumonia, COVID-19, sepsis, other diseases and ill-defined causes.

The grouping is ours, not the CDC’s, and it is a rough guide rather than a measurement of warning time. Its point is simple. A younger adult who dies is most likely to die suddenly, so the documents that matter are the ones that already exist. An older adult is most likely to die after a long illness, so the documents that matter most may be the ones used while the person is still alive but unable to act.

Before 45: half of deaths come without warning

In 2024, 155,257 Americans died between the ages of 25 and 44. More than half of those deaths, 79,922, came from external causes. Drug overdoses alone caused 34,247 (22.1%). That is more deaths than cancer (15,242) and heart disease (15,118) caused in that age group combined.

The pattern holds, a little weaker, across the broader prime working and parenting years of 25 to 54:

Drug overdoses follow the CDC’s standard definition and include all intents (accidental, suicide, homicide and undetermined), so the suicide and homicide rows above exclude drug deaths to avoid counting anyone twice. Overall in 2024, the CDC counted 79,384 drug overdose deaths, 48,824 suicides and 20,162 homicides of all ages; our tallies match those official totals.

Why this matters for estate planning: a sudden death leaves no time to sign anything. Whatever documents exist that morning are the plan. For a parent of young children, that means the will that names a guardian, the beneficiary forms on life insurance and retirement accounts, and, if the parents want someone other than a court to manage what the children inherit, a trust or custodian named in advance. Our research on who would raise the kids and the chance of dying before 65 in each state goes deeper on that risk.

The parenting years: most who die at 25 to 54 are not married

Death certificates also record marital status. Among people who died at ages 25 to 54, the share who were married has fallen sharply over twenty years.

In 2024, 48.0% of people who died at 25 to 54 had never married, up from 30.3% in 2004. Over half of men who died in that age range (51.7%) had never married. Some had partners, and many had children; the certificate does not say.

This matters because state default rules, called intestacy laws, are built around marriage. When someone dies without a will, a surviving spouse usually inherits most or all of the estate. An unmarried partner, however long the relationship, generally inherits nothing under those default rules, and stepchildren usually inherit nothing from a stepparent. If there is no spouse, the estate typically passes to the person’s children, or to parents and siblings if there are no children. A minor child cannot manage an inheritance, so a court may need to appoint someone to manage it, and if the other parent is not in the picture, a court decides who raises the child. Our intestacy gap research counts the unmarried couples and stepfamilies these default rules leave out.

Medical decisions follow a similar default. If a person is hurt and cannot speak for themselves, most state surrogate laws turn first to a spouse. An unmarried partner may have no legal standing unless named in a health care proxy. Under the federal HIPAA privacy rule, a person with legal authority to make health care decisions for a patient is treated as the patient’s personal representative, which is one reason a signed proxy matters to hospitals.

Midlife, 45 to 64: usually a diagnosis, sometimes not

Deaths at 45 to 64 look different. In 2024, 515,966 Americans died in that age range. Cancer caused 131,043 of those deaths (25.4%), and heart disease and stroke 124,539 (24.1%). Illnesses that usually follow a diagnosis caused 39.8% in total.

That usually means some warning. But “some warning” is not the same as “enough time.” People in treatment are often too sick, tired or overwhelmed to sit down with a lawyer, and a will signed in a hospital bed is more likely to be challenged for lack of capacity or undue influence than one signed years earlier. And 14.7% of midlife deaths (75,896) still came from injuries, overdoses, suicides and homicides, with no warning at all.

Midlife is also when estates get more complicated. Many people in this age range have a house, retirement accounts, a business or children from more than one relationship. Retirement accounts and life insurance go to the person named on the beneficiary form, not to whoever the will names; see our research on money that skips the will. For plans governed by federal ERISA rules, the U.S. Supreme Court held in Egelhoff v. Egelhoff (2001) that the plan pays the named beneficiary even when a state law would have revoked an ex-spouse’s designation after divorce.

After 65: long illnesses and dementia

Three in four deaths (76.2%) happen at 65 or older. In 2024 that was 2,341,600 people. For this group, sudden external causes are rare (3.9%), and long illnesses dominate: cancer, dementia, Parkinson’s disease, chronic lung disease, kidney and liver disease and diabetes caused 42.5% of deaths. Heart disease and stroke caused another 30.2%.

Dementia stands out. The underlying cause on a death certificate is only one line, and cause-of-death rankings use only that line. But certifiers can also list other conditions that contributed. When we count every certificate where Alzheimer’s disease or another dementia appears anywhere, the numbers are much larger:

The CDC’s official count of Alzheimer’s disease deaths in 2024 was 116,022. That figure counts only Alzheimer’s disease (ICD-10 code G30) as the underlying cause. Adding vascular and unspecified dementia as the underlying cause brings the total to 224,550 deaths of all ages, and adding certificates where dementia contributed brings it to 372,883 of all ages. Even that is likely an undercount, because dementia is often left off death certificates.

Why dementia matters so much for an estate plan: dementia takes away legal capacity gradually, often over years. Once a person can no longer understand what they are signing, it is too late to sign a will, a trust, a power of attorney or a health care proxy. Then the family’s options shrink to whatever documents already exist, and if there are none, a court guardianship or conservatorship, which is slower, more expensive and public. Our incapacity gap research covers how many older adults already have serious memory or decision-making trouble, and our research on married couples where one spouse has memory trouble covers what that means for the other spouse.

Twenty years of change

For younger adults, the share of deaths from external causes rose from 40.7% in 2004 to a peak of 55.7% in 2023, driven mostly by drug overdoses, whose share more than doubled from 10.4% to 27.6%. In 2024, overdose deaths fell and the share dropped to 51.5%, still well above 2004. Deaths at 25 to 44 also jumped in 2020 and 2021, when COVID-19 and overdoses both rose, before falling back.

For older adults, the number of deaths with dementia on the certificate rose from 242,984 in 2004 to 367,388 in 2024 (the peak, 446,841, came in 2020, the first year of the COVID-19 pandemic). As a share of all deaths at 65 and older, dementia mentions rose from 13.8% to a high of 17.9% in 2014 and have been between 15.6% and 17.8% since. The number of older Americans keeps growing, so the number of families facing dementia at the end of life keeps growing too.

What this means for your plan, at every age

In your 20s and 30s: this is the age when death is most likely to be sudden. If you have children, a will naming a guardian is the single most important document. Check the beneficiary forms on any life insurance, workplace retirement plan and bank or brokerage accounts. If you are not married to your partner, a will (or trust) and beneficiary forms are the only way your partner inherits, and a health care proxy is the only way your partner can reliably speak for you in a hospital.

In your 40s and 50s: sudden deaths are still common, and estates are usually at their most complicated: a house, retirement accounts, maybe a business, maybe children from more than one marriage. This is when many families decide whether a will alone is enough or whether a revocable living trust makes sense to avoid probate, manage money for children or keep things private. Add a durable financial power of attorney and a health care proxy if you don’t have them.

In your 60s: cancer is the leading cause of death at 55 to 74. A diagnosis can come with time to plan, but treatment leaves little energy for it, and documents signed during a serious illness are easier to challenge. Review and update everything while you are well: your will or trust, your beneficiary forms, your powers of attorney and your health care wishes.

At 75 and older: dementia is listed on 14.3% of death certificates at 75 to 84 and 24.6% at 85 and older. The key risk is no longer a sudden death without a will. It is losing the capacity to sign while still alive. A durable power of attorney, a health care proxy and, for many families, a funded living trust with a named successor trustee let someone you choose step in without a court. Our research on who will be your executor covers what happens when there is no spouse or nearby child to take that role.

At any age: a plan only works if people can find it. Tell your executor, trustee and health care agent where your documents are, and update the plan after big life events, as our research on life events that outdate a will shows.

Methodology

• Data: CDC National Center for Health Statistics (NCHS) Multiple Cause of Death public-use files for 2004, 2009 and every year from 2014 through 2024. Each file has one record per death certificate filed in the United States. 2024 is the latest year NCHS has released.
• Universe: U.S. residents only. We dropped records coded as foreign residents (9,798 in 2024), which is how NCHS builds its official U.S. totals. Our 2024 total, 3,072,666 deaths, matches the CDC’s official count exactly.
• Age: age at death from the detail age field, grouped into 10-year bands. A small number of records with unknown age (57 in 2024) are included in all-ages totals only. Deaths of children under 25 are included in all-ages totals but not shown as a separate row, since this page is about adults’ planning.
• Causes: grouped by the ICD-10 underlying cause of death using the NCHS definitions: cancer (C00–C97), heart disease (I00–I09, I11, I13, I20–I51), stroke (I60–I69), chronic lower respiratory disease (J40–J47), diabetes (E10–E14), kidney disease (N00–N07, N17–N19, N25–N27), chronic liver disease and cirrhosis (K70, K73–K74), Parkinson’s disease (G20–G21), and Alzheimer’s disease and other dementias (F01, F02, F03 and G30). External causes are V01–Y89 plus the U01–U03 terrorism codes. Drug overdoses use the CDC definition (X40–X44, X60–X64, X85, Y10–Y14) and cover all intents; our suicide and homicide groups exclude drug deaths so no death is counted twice.
• Dementia listed anywhere: a death counts if F01, F02, F03 or G30 appears in any of the up to 20 record-axis conditions on the certificate (the NCHS multiple-cause list), whether as the underlying cause or a contributing condition.
• Marital status: as reported on the death certificate, usually by a family member or other informant.
• Checks: our 2024 counts match the CDC’s published 2024 figures for total deaths, heart disease, cancer, unintentional injuries, stroke, chronic lower respiratory disease, Alzheimer’s disease, diabetes, kidney disease, liver disease, suicide, homicide, falls, unintentional poisoning and drug overdoses. We also re-read every file a second time with separate code, using the NCHS age recode instead of detail age, and every figure on this page matched.
• Limits: the “sudden” and “usually follows a diagnosis” groups are our planning shorthand, not a measurement of how much warning each person had. Some cancers progress quickly, and some injuries (such as falls in frail older adults) follow long decline. Death certificates often leave dementia off, so the dementia counts are a floor. Public-use files have had no state or county geography since 2005, so this page is national only.

Frequently asked questions

What is the most common cause of death by age?

In 2024, drug overdoses were the leading single cause of death for adults 25 to 44 (22.1% of deaths), and injuries, overdoses, suicides and homicides together caused 51.5%. From 45 to 74, cancer is the biggest single cause (25.4% at 45 to 64 and 28.9% at 65 to 74). At 75 to 84, cancer (22.3%) and heart disease (22.1%) are nearly tied. At 85 and older, heart disease leads (27.3%), and dementia is listed on about 1 in 4 death certificates.

What percentage of deaths are sudden?

For all ages combined, 9.0% of 2024 deaths (275,018) came from external causes such as accidents, overdoses, suicides and homicides. Some heart attacks and strokes are also sudden, but death certificates cannot separate them from deaths after long heart disease. The share of external-cause deaths is far higher for younger adults: 63.7% at 25 to 34 and 44.2% at 35 to 44.

How many people die before age 65?

In 2024, 731,009 Americans died before 65, which is 23.8% of all deaths. In 2004 the share was 26.8%.

How many people have dementia when they die?

Dementia was listed on 367,388 death certificates of people 65 and older in 2024 (15.7%), and on 24.6% of certificates of people 85 and older. That includes deaths where dementia was the underlying cause (221,781 at 65 and older) and deaths where it was a contributing condition (145,607). Because dementia is often left off death certificates, the true share is likely higher.

At what age should I make a will?

As soon as you have anyone or anything you want to protect: a child, a partner you are not married to, a home or savings. The data show that deaths before 45 are mostly sudden, so waiting for a warning sign is a poor strategy. A guardian for minor children can only be named in advance, usually in a will.

Why do I need a power of attorney if I already have a will?

A will only works after death. A durable power of attorney and a health care proxy work while you are alive but unable to act, which is the situation dementia and many long illnesses create. Without them, your family may need a court guardianship or conservatorship to pay your bills or make medical decisions.

Can someone with dementia still sign a will?

Sometimes, in the early stages. Courts look at whether the person understood what they owned, who their family was and what the will did at the moment of signing. But a will signed after a dementia diagnosis is more likely to be challenged, and in later stages signing is no longer possible. The safest time to sign is before any diagnosis.

Sources

Data

• CDC National Center for Health Statistics, Multiple Cause of Death public-use data files, 2004, 2009 and 2014–2024 (one record per U.S. death certificate): https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Datasets/DVS/mortality/
• NCHS, 2024 Mortality Multiple Cause-of-Death Public Use Record documentation (field locations for age, sex, marital status, underlying cause, 113-cause recode, record-axis conditions and resident status): https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/DVS/mortality/2024-Mortality-Public-Use-File-Documentation.pdf
• NCHS record layouts for earlier years (2004, 2009, 2014): https://ftp.cdc.gov/pub/Health_Statistics/NCHS/Dataset_Documentation/DVS/mortality/
• CDC FastStats, Deaths and Mortality (official 2024 total and leading-cause counts): https://www.cdc.gov/nchs/fastats/deaths.htm
• CDC FastStats, Accidents or Unintentional Injuries; Suicide; Homicide; Drug Overdoses; Alzheimer Disease (official 2024 counts used to check our tabulation): https://www.cdc.gov/nchs/fastats/accidental-injury.htm, https://www.cdc.gov/nchs/fastats/suicide.htm, https://www.cdc.gov/nchs/fastats/homicide.htm, https://www.cdc.gov/nchs/fastats/drug-overdoses.htm, https://www.cdc.gov/nchs/fastats/alzheimers.htm

Law

• 45 CFR 164.502(g), HIPAA privacy rule, personal representatives: https://www.ecfr.gov/current/title-45/subtitle-A/subchapter-C/part-164/subpart-E/section-164.502
• Egelhoff v. Egelhoff, 532 U.S. 141 (2001): https://www.law.cornell.edu/supct/html/99-1529.ZO.html

Cite this data

Published November 11, 2026 by Family Estate Guide. Figures are Family Estate Guide tabulations of every U.S. resident death certificate in the NCHS Multiple Cause of Death public-use files; the 2024 file is the latest NCHS has released, and its U.S. total matches the CDC’s official count of 3,072,666 deaths. Editorial standards.