Loneliness by Generation: Why Young Adults Are the Loneliest

Key takeaways

• The loneliest generation isn't the elderly — it's young adults. A 2021 Harvard study found 61% of 18–25-year-olds reported serious loneliness.
• It's a paradox: the most digitally connected generation in history reports the least sense of genuine connection.
• Loneliness follows a U-shape across life — highest in young adulthood and again in the oldest years — and responds to the same remedy at any age: being genuinely heard.

Ask most people which age group is the loneliest and they'll picture an elderly person, alone at a window. It's an intuitive image — and the data says it's largely wrong. Across study after study, the generation reporting the most loneliness is the youngest adult one: Gen Z and younger millennials, the people who have never known a world without smartphones.

Here's what the research actually shows about loneliness by generation, why the most connected age group is also the loneliest, and what the numbers suggest helps.

Which generation is the loneliest?

The clearest single figure comes from the Harvard Graduate School of Education's Making Caring Common project. Its 2021 "Loneliness in America" report found that 36% of all Americans reported "serious loneliness" — and among young adults aged 18 to 25, that figure jumped to 61%, the highest of any age group surveyed.

It isn't a one-off. Cigna's long-running U.S. loneliness research has repeatedly identified Gen Z as the loneliest generation, with younger millennials close behind and older generations reporting the least loneliness. And the 2023 Meta-Gallup global survey found that, worldwide, adults aged 19–29 were among the loneliest of all — younger, on average, than the older adults we tend to assume are most isolated.

Loneliness by generation: the pattern in the numbers

Pulling the research together, a consistent pattern emerges:

• Gen Z (roughly late teens–20s): the loneliest cohort in most surveys, despite — or because of — being the most online.
• Younger millennials: close behind, reporting high loneliness as they navigate careers, moves, and delayed milestones.
• Gen X / older millennials: typically report lower loneliness, often buffered by more settled relationships and routines.
• Boomers and older: lower loneliness on average than the youngest adults, though isolation rises again in the oldest years, particularly after the loss of a partner or a decline in mobility.

The takeaway isn't that older people don't get lonely — many do, often acutely. It's that the peak of reported loneliness sits at the start of adult life, not the end. (For the broader prevalence picture across the whole population, see our loneliness statistics breakdown.)

The paradox: the most connected generation is the loneliest

Here's what makes this so striking. Gen Z has more ways to reach other people than any generation in history — messaging, video, social platforms, communities for every interest. On paper, they should be the least lonely. In practice, they report the most.

The explanation is the distinction at the heart of all loneliness research: being in contact is not the same as feeling connected. You can have hundreds of followers and no one who truly knows you; a full group chat and no one to call at 2am. Digital contact often delivers the appearance of connection — likes, updates, replies — while providing little of the felt experience of being understood. For a generation whose social life runs heavily through screens, that gap is wide. (We explore a newer twist on this — turning to chatbots for company — in AI companions and loneliness.)

Why are young adults so lonely?

Several forces stack up on younger generations at once:

• Social media and comparison. Endless curated highlight reels make it easy to feel that everyone else is more connected, more successful, and less alone — a corrosive, constant comparison older generations didn't grow up inside.
• Delayed and disrupted milestones. The traditional markers that once built community — stable jobs, moving in with a partner, buying a home — are arriving later or not at all, leaving many young adults in prolonged, unsettled in-between stages.
• Remote work and study. For many, the incidental daily contact of a workplace or campus — the corridor chats, the shared lunch — has thinned out or vanished.
• Fewer "third places". The cafés, clubs, and community spaces where casual, repeated connection used to happen have declined.
• Economic pressure. Financial stress narrows social life and adds to isolation.
• Disrupted formative years. For the youngest adults, key social-development years were interrupted, and the habits of in-person connection never fully formed.

None of these are personal failings. They're structural — which means the loneliness they produce is a circumstance, not a character flaw. (If you're feeling this yourself, why am I so lonely? goes deeper into the causes and what helps.)

It's not only the young: the U-shape

To be fair to the full picture, loneliness isn't only a young-person story. A large body of research suggests loneliness follows a rough U-shape across the lifespan: high in young adulthood, dipping through the more settled middle years, and rising again in later life — especially among the oldest adults facing bereavement, health decline, and living alone.

So the honest summary is this: loneliness is highest at the two ends of adult life, and the young-adult peak is the one that most defies our assumptions. Both deserve attention; neither should carry shame.

What the data suggests helps

Encouragingly, the remedy looks similar across every generation, because the underlying need is the same — to be genuinely understood by another person:

1. Prioritise depth over volume. A few real, honest relationships protect against loneliness far more than a large number of shallow contacts.
2. Trade some passive screen time for real conversation. Not "quit social media", just tilt the balance toward exchanges where you actually feel heard.
3. Build repeated, in-person contact. Recurring activities — a class, a team, a volunteer shift — recreate the proximity and repetition that friendships grow from.
4. Reach out before you feel ready. Loneliness breeds hesitation, so waiting to "feel like it" rarely works. Small, deliberate contact interrupts the cycle.
5. Let yourself be heard. One honest conversation genuinely can shift a day — and repeated over time, it rebuilds belonging.

When loneliness needs more support

Most loneliness eases with connection, but it can sit on top of something heavier. If loneliness comes with persistent hopelessness, an inability to function, total withdrawal, or thoughts of harming yourself, please treat it seriously and reach out for professional support — see our get help now page.

If you are in crisis, please contact 988 (US & Canada) or Samaritans 116 123 (UK & Ireland), or your local emergency number.

A place to actually be heard — at any age

If the core problem is contact without genuine connection, the fix is a conversation where you actually feel understood — and that shouldn't depend on your age, your social circle, or the time of night. That's exactly what Conversation Matcher is for: you pick what's on your mind — including loneliness itself — and get matched one-to-one with a real person who chose the same topic and wants to talk. It's free, anonymous by default, and there's no feed, no profiles, and no pressure. If you need it, you can talk to someone online right now.

It's peer conversation, not therapy — but for a generation drowning in contact and starved of connection, being heard by one real person is often the thing that helps most.

Frequently asked questions

Which generation is the loneliest? Young adults — Gen Z and younger millennials — not older people. A 2021 Harvard study found 61% of 18–25-year-olds reported serious loneliness, the highest of any age group, and Cigna's research has repeatedly found Gen Z the loneliest generation.

Aren't older people the loneliest? It's a common assumption, but young adults report the highest overall loneliness. Isolation does rise again in the oldest years, so loneliness follows a U-shape — peaking in young adulthood and later life.

Why are young adults so lonely if they're the most connected? Because being online isn't the same as feeling understood. Social media replaces presence with performance and comparison, and young adults also face delayed milestones, remote work and study, fewer in-person spaces, and economic pressure.

Is loneliness among young people getting worse? Most research suggests loneliness has risen over recent decades, with young adults among the most affected — serious enough that the U.S. Surgeon General called it an epidemic in 2023.

What helps with loneliness at any age? Prioritising a few genuine connections over many shallow ones, swapping some screen time for real conversation, joining recurring in-person activities, and reaching out before you feel ready. Being genuinely heard is the common thread.