The Loneliest Age Isn’t Old Age: What a New Global Study Reveals About Twenty-Somethings and Isolation

You already know the feeling this piece is about. You just might not have known there was a number attached to it.

Picture the last time you were in a room full of people who liked you well enough — a work leaving-do, a cousin’s birthday, a group chat’s IRL reunion — and you still spent half the evening watching yourself from somewhere just above your own shoulder, smiling on cue, waiting for it to be late enough to leave without it looking strange. That gap between being surrounded and being known is not a mood. According to the newest global research on loneliness, it is one of the defining mental health stories of your generation, and if you are in your twenties, you are more likely to be living inside it than almost anyone else on the planet.

For years, the loneliness conversation has pointed at the elderly widower down the road, the grandmother who hasn’t had a visitor in a fortnight. That image is not wrong — older people’s isolation is real and it is dangerous. But it has quietly become out of date. A study published this year, drawing on nearly 8,000 adults across eight countries, found that people aged 18 to 24 are now the loneliest age group surveyed, not the oldest. Almost one in two young adults said they felt lonely. Among people over 55, it was closer to three in ten. If you have ever felt that particular hollowness in the middle of a full social calendar — the sense that you are attending your own life rather than living it — this is the research that finally has your name on it.

A number nobody expected

In June 2025, the World Health Organization published the findings of its Commission on Social Connection, the first global report of its kind. The numbers are big enough to skim past without registering, so it’s worth slowing down on what they actually say. It concluded that around one in six people worldwide is affected by loneliness serious enough to damage their health, and that loneliness and social isolation are linked to roughly 871,000 deaths every year — something in the region of a hundred people, somewhere in the world, every hour. Isolation of this kind is associated with a higher risk of stroke, faster cognitive decline, raised inflammation in the body, and a marked deterioration in mental health.

The report did not describe loneliness as evenly spread. Among adolescents and young adults aged 13 to 29, between 17 and 21 per cent report significant loneliness, the highest rate of any age band the commission studied. If you’re anywhere in that range, this is the group the commission found lonelier than any other it measured — which is exactly why the second, more detailed study below zooms in on people your age specifically. People in lower-income countries reported loneliness at roughly double the rate of people in wealthy nations — around 24 per cent compared with 11 per cent — a reminder that this is as much a story about inequality, insecure housing and long working hours as it is about mood. Professor Shereen Hussein of the London School of Hygiene and Tropical Medicine, who advised the commission, put it plainly: social connection, she said, “is not a luxury” but “a health imperative that must be embedded in all levels of policy, care and community life.” The commission named the usual suspects — poor health, financial hardship, limited education, living alone — but it also named something newer: what it called problematic digital technology use, the kind of scrolling that fills the shape of company without providing any of its substance.

The generation that grew up wired together, alone

The WHO’s global figures set the scene. It’s the second study, published in early 2026 by researchers at Washington University in St Louis, that fills in the detail you’ll probably recognise. Led by Dr Salma Abdalla, with Dr Sandro Galea as senior author, the team surveyed close to a thousand adults in each of eight countries — Brazil, France, India, Indonesia, Nigeria, the Philippines, Turkey and the United States — using nationally representative samples and careful cross-country translation, between November 2023 and February 2024.

Across all eight nations, nearly four in ten adults described themselves as lonely. But the finding that should stop you mid-scroll is the age breakdown: among 18 to 24-year-olds, it was closer to one in two. Among adults over 55, it was roughly three in ten — almost the reverse of the picture you’ve probably been carrying around in your head. The people you might assume are best equipped for connection — young, digitally fluent, theoretically one message away from anyone they’ve ever met — are the ones reporting the most loneliness of all.

The study also found that loneliness rarely travels alone. If you’ve been feeling it, this part is probably not news: people who reported feeling lonely had almost three times the odds of meeting the screening criteria for depression, and nearly four times the odds of meeting the criteria for generalised anxiety disorder (GAD) — a diagnosis characterised by persistent, hard-to-control worry across many areas of life, not tied to one specific trigger. This pattern held in every country the researchers studied, from India, where 3.4 per cent of respondents met the depression screening threshold, to Brazil, where the figure reached 15.8 per cent. Different cultures, different economies, different histories — and still, wherever loneliness showed up, low mood and anxiety were close behind it. Women, people with lower income or less formal education, those who were unmarried, and city-dwellers all reported higher rates of loneliness than their counterparts.

Does any of that sound like your week? Not the big dramatic version of loneliness, necessarily — not always tears at 2am — but the smaller, more ordinary version: the read receipt with no reply, the plans that get rescheduled until they quietly stop being made, the sense that everyone else already has their people sorted and you are the one still auditioning.

Why your twenties, of all decades

It is worth pausing on why this age group in particular. Your twenties are probably the decade with the fewest built-in structures for meeting anyone new. School and university hand you a room full of people your own age, five days a week, for years — a kind of social scaffolding you probably only notice once it’s gone. Work rarely replaces it in full: colleagues come with schedules, hierarchies and a natural end-point at 5.30pm. Meanwhile the transitions stack up fast — a first flat, a first proper job, a break-up, a move to a new city for a role that looked good on paper and left you friendless by 6pm on a Tuesday. Each of these is, on its own, a perfectly manageable life event. Piled on top of each other, in a decade when your friendship group is also going through the same upheavals at different speeds, they add up to something that can feel less like a bad patch and more like a permanent condition.

Social media complicates rather than solves this. It is very good at showing you the version of everyone else’s life that looks most populated, and much worse at showing you the quiet Tuesday evenings everyone actually has. Researchers who study loneliness draw a useful distinction here between passive scrolling — watching other people’s lives without interacting — and active use, like messaging a friend to arrange something real. The first tends to correlate with feeling worse. The second doesn’t carry the same cost. The apps are not the villain of this story on their own; how you use them, and what they quietly displace, seem to matter more than the fact of using them at all.

If you are reading this while waiting for an assessment, newly signed off work with stress, or simply aware that your evenings have gone quiet in a way you didn’t choose, none of what follows is about trying harder to enjoy a party. That isn’t laziness. It’s just where you are right now. What follows is about the specific, ordinary mechanics of rebuilding contact when the usual scaffolding has gone.

What this study can’t tell you — and why that matters before you act on it

Before you take any of this further, here is what the research genuinely cannot promise you — and it matters, because misreading it is the kind of mistake that can send you down the wrong path. The eight-country study is cross-sectional: it captured one moment in time, in eight countries, over four months. It can tell you that loneliness and low mood travel together; it cannot tell you which one comes first, or whether a third factor — a difficult year, an illness, financial strain — is quietly driving both. The researchers themselves were careful about this, stating outright that the study “cannot determine cause and effect,” and that only longitudinal research — following the same people over years, rather than surveying different people once — could really settle that question. Here is what that gap means for you: you don’t have to read this as “loneliness causes depression” and panic, and you don’t have to read it as “my depression is just loneliness talking” and quietly stop looking for other support. What the data can responsibly tell you is narrower, and more useful — the two show up together often enough, across enough different countries, that if one has crept in, it’s worth checking honestly for the other.

Here I want to slow down, because hope without honesty helps no one. It would be easy to read “nearly half of young adults are lonely” and either panic or shrug it off as everyone being fine, actually, since so many people share the feeling. Neither reaction is quite right. Loneliness this widespread is a public health pattern worth taking seriously at a population level, and it is also, for you individually, a specific and answerable problem — not a verdict on your character, your likeability, or your twenties as a whole. It isn’t a verdict on you at all.

What actually helps

None of the research above offers a cure, because loneliness isn’t the kind of thing that has one. But it does point fairly consistently towards a handful of things worth trying, particularly the distinction between passive and active contact, and the value of what psychologists call “weak ties” — the barista, the regular at your gym class, the person two desks over — which research by social psychologist Gillian Sandstrom has repeatedly linked to a small but real boost in daily wellbeing, quite separate from your close friendships.

• Trade one scroll for one message. Next time your thumb goes to open an app to see what everyone else is doing, message one specific person instead, about one specific plan — a coffee, a walk, a phone call. Active contact tends to help; passive scrolling tends not to.
• Say yes to the low-effort invitation. A five-minute chat with a neighbour, or the colleague you’ve never quite got to know, doesn’t need to turn into a deep conversation to count — brief, repeated contact with the same people builds familiarity faster than you’d expect.
• Build something recurring, not one-off. A regular class, a Thursday running club, a standing shift volunteering somewhere — anything with a fixed day and a returning group of faces does more for loneliness over months than any single well-intentioned night out.
• Be the one who organises, at least once. Waiting to be invited puts your entire social life in other people’s hands. Sending the message first, even when it feels exposing, is one of the few moves that stays within your control.
• If low mood or anxiety has moved in alongside the loneliness, say so to your GP. Given how strongly this research links the two, a conversation that starts with “I think I might be depressed” and one that starts with “I think I’m just lonely” often deserve the same appointment.

If you are in the UK, the NHS’s Every Mind Matters service and your local council’s community and wellbeing hub (most areas, including here in Milton Keynes, run free social and activity groups aimed specifically at reducing isolation) are worth a search before you assume there’s nothing structured nearby. You are very unlikely to be the only person in your postcode looking for exactly this.

The part that’s easy to miss

If you’ve ever gone looking for evidence that you’re somehow uniquely bad at this — that everyone else has simply worked out something you haven’t — the research won’t back you up. What it shows instead is a generation-wide pattern, present from Lagos to Jakarta to your own high street, that has far more to do with how modern life is currently structured than with any personal failing. Knowing that won’t fill a Friday evening on its own. But it might change what you do with the next one — not by trying to feel less alone, but by making one small, concrete, slightly uncomfortable piece of contact happen this week, and letting the feeling follow the action rather than waiting for it to lead the way.

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Source: World Health Organization, From Loneliness to Social Connection: Charting a Path to Healthier Societies — Report of the WHO Commission on Social Connection (30 June 2025); S. Abdalla, S. Galea et al., eight-country loneliness and mental health survey, Washington University in St Louis, Brown School of Public Health (published 2026).