BetterLoneliness is usually discussed as a private matter, and a slightly embarrassing one, something closer to a personality trait than to a condition.
The World Health Organization set up a commission on it, and published the result on 30 June 2025. The vocabulary of that report is the vocabulary of public health, and the figures are of the size normally reserved for diseases.
Loneliness affects one person in six worldwide. The WHO estimates it is behind around 100 deaths an hour, more than 871 000 a year. It raises the risk of stroke, heart disease, diabetes, cognitive decline and early death, and those who feel lonely are twice as likely to experience depression.
And it is not evenly spread: 24% in low-income countries against 11% in high-income ones.
The reportWhat the WHO measured
A WHO commission is not a press release. It is a multi-year body with co-chairs, a method and a published report, the same instrument the organisation uses for subjects it intends to act on.
Its starting definition matters, because it decides what gets counted. The WHO defines social connection as “the ways people relate to and interact with others”, and treats its absence as measurable.
Read the second figure carefully, because we did. The WHO writes that loneliness is “at the origin of” an estimated 100 deaths an hour. That is an estimate of an association at population scale, published by the WHO. It is not a count of death certificates, and nobody presents it as one, including the WHO.
The mechanismWhat it does to the body
The list the WHO gives is the reason the word flaw does not survive contact with this report.
- Increased risk of stroke.
- Increased risk of heart disease.
- Increased risk of diabetes.
- Increased risk of cognitive decline.
- Increased risk of premature death.
And on mental health, two findings stated plainly: people who feel lonely are twice as likely to experience depression, and loneliness “can also contribute to anxiety and to thoughts of self-harm or suicide”.
A condition that raises the risk of stroke and diabetes is not a mood. Whatever loneliness is, the body is doing something with it.
The distributionIt is not evenly spread
If loneliness were a matter of temperament, it would fall roughly evenly across societies. It does not.
Two patterns, and neither is about character. Loneliness is twice as common where people are poorer, and it is highest among the youngnot, as the cliché has it, among the old.
The adolescent finding is the one to sit with. The age group most often described as permanently connected is the one reporting the highest rate of loneliness in the WHO's data. Being reachable and being connected are not the same measurement.
The causesThe causes named, none of them a trait
Here is the WHO's list of contributing factors, in full. Read it looking for a personality trait.
“Poor health, low income or education, living alone, inadequate community infrastructure and public policies, and digital technologies.”
Five factors. Three are material conditions. One is a public decision. One is a technology. None is a way of being.
Inadequate community infrastructure and public policies is the item worth noticing. It means that whether a place has somewhere to go, something to join and a way to get there is counted, by the WHO, among the causes of loneliness.
And the consequences run outward too. Adolescents who feel lonely are 22% more likely to get poor grades or qualifications. Adults who feel lonely may struggle more to find or keep work, and risk lower earnings over time. The WHO adds that, left unaddressed, this will keep costing societies billions of dollars in health care, education and employment.
What followsWhat changes when you see it this way
- It stops being embarrassing. Nobody apologises for having high blood pressure. A condition the WHO ties to stroke and diabetes does not require an apology either.
- It stops being an individual problem to solve alone. If community infrastructure and public policy are on the list of causes, then part of the answer is built, funded and decided, not willed.
- It stops being about the old. The highest rates in the WHO's data are among adolescents and young adults.
The one thing this article cannot do is tell you what to do about your own. What it can do is remove one sentence from the conversation: there must be something wrong with me. One person in six, twice as often where money is short, most often among the young, that is not a description of a personal failing.
There is no worldwide helpline, and numbers change from one country to the next. Two markers hold everywhere.
If there is immediate danger, call your country’s emergency number.
Otherwise, Find A Helpline lists more than 1,700 free and confidential helplines in over 175 countries. You pick your country, it shows what exists near you, with opening hours. The site itself is in English, but the lines it points to are local.
This is not a clinical recommendation. It is the one international directory that states it verifies its data with the helpline organisations themselves and maintains it daily.
QuestionsFrequently asked questions
How many people does loneliness affect?
One person in six worldwide, according to the report of the WHO Commission on Social Connection, published on 30 June 2025. That is not an atmospheric estimate: it is the output of a commission, with a method and data.
What does the WHO say about deaths?
Its exact wording: “loneliness is linked to an estimated 100 deaths every hour, more than 871 000 deaths annually.” That is the figure that made headlines, and it comes from a World Health Organization press release, not from an advocacy group.
What are the health effects?
The WHO writes that loneliness and social isolation increase the risk of stroke, heart disease, diabetes, cognitive decline and premature death. On mental health, people who feel lonely are twice as likely to experience depression, and loneliness can contribute to anxiety and to thoughts of self-harm or suicide.
Who is most affected?
Young people, and people living in low- and middle-income countries. Between 17% and 21% of 13-to-29-year-olds report feeling lonely, the highest share among adolescents. And about 24% of people in low-income countries report loneliness, twice the rate in high-income countries, where it is around 11%.
What causes does the WHO name?
A list that contains no personality traits: “poor health, low income or education, living alone, inadequate community infrastructure and public policies, and digital technologies”. Three of those five are material conditions, and one is a public decision.
Does loneliness have effects beyond health?
Yes, and the WHO puts figures on them. Adolescents who feel lonely are 22% more likely to get poor grades or qualifications. Adults who feel lonely may find it harder to get or keep a job, and risk lower earnings over time.
Read nextRelated
Sources
- Social connection linked to improved health, World Health Organization, 30 June 2025
- WHO Commission on Social Connection
About this article. General and educational information. The figures are global estimates published by the World Health Organization on 30 June 2025: they describe population-level associations, not any individual's situation. This article makes no diagnosis and does not replace assessment by a qualified person.
Spotted an error or an out-of-date figure? Write to us: we will correct it and re-date the article. Our texts are written with the help of artificial intelligence and checked against official sources before publication, but a figure or a definition can change without us catching it. If anything here does not match what an official body tells you, they are right.