Why Young Adults, Not Older Adults, Report the Most Loneliness

Gallup’s 2023 World Poll, drawing on interviews with roughly 1,000 people aged 15 and older in each of 142 countries, found that 27% of adults aged 19 to 29 report feeling very or fairly lonely, against 17% of adults 65 and older. That is not a marginal gap. Young adults report loneliness at roughly one and a half times the rate of the group most policy attention has been built around.

This pattern is not a one-off. Harvard’s Making Caring Common project found 61% of American 18-to-25-year-olds reporting serious loneliness in early 2021, compared with 51% of mothers with young children – itself a high-risk group – and well above the population figure. Cigna’s 2020 workplace survey put loneliness among workers aged 18 to 22 at 73%, and above 80% among employed Gen Z overall. A 2026 eight-country study led with the finding that nearly half of young adults report loneliness, with the loneliness-depression and loneliness-anxiety associations holding after adjustment for prior diagnoses. Every major instrument that breaks results down by age arrives at the same ranking: younger is lonelier.

That inverts the picture most institutional attention has assumed.

The infrastructure built for the wrong age group

The National Academies’ 2020 consensus report on social isolation and loneliness in older adults estimated that roughly a quarter of Americans 65 and older are socially isolated, and called on the health care system to build routine assessment of isolation and loneliness into geriatric care. AARP’s tracking survey of adults 45 and older, run in 2018 and repeated in 2025 with a consistent 20-item UCLA Loneliness Scale instrument, has anchored much of the subsequent policy conversation about later life. Much of the clinical and public health apparatus that has emerged since – social prescribing programs, senior center outreach, Medicare-adjacent screening proposals – was built to address loneliness in old age.

None of that work is wrong on its own terms. Isolated older adults face measurable elevated mortality risk: Holt-Lunstad’s 2015 meta-analysis in Perspectives on Psychological Science found social isolation carried an odds ratio of 1.29 for early mortality, comparable to well-established risk factors, and that these effects were, if anything, more pronounced in samples averaging under 65 than in older cohorts. But the emphasis on old age as the locus of the loneliness problem rests more on isolation – a structural fact about network size and living arrangement – than on loneliness, the subjective experience the recent surveys are actually measuring. Those are different things, and treating them as interchangeable is precisely how the age pattern gets inverted in public discussion.

Isolation and loneliness move in opposite directions across age

A 2024 study in Scientific Reports examining social isolation, age, and loneliness during the pandemic found that the relationship between the two constructs varies by age group in ways that a single national loneliness figure obscures. Older adults are, by nearly every structural measure, more isolated: smaller networks, more likely to live alone, more likely to have lost a spouse or peers to death. Younger adults are, by the same structural measures, less isolated: they typically have larger friendship and family networks and more frequent daily contact. And yet it is the less-isolated group that reports the more acute subjective loneliness.

A 2026 study of risk factors among community-dwelling socially isolated older adults reinforces the distinction directly, examining which isolated older adults go on to feel lonely and finding it is not isolation alone that predicts the subjective state – other factors, including health status and the perceived adequacy rather than the raw size of a support network, do more of the work. Isolation appears to be a necessary condition for loneliness in some older adults and not remotely a sufficient one.

Gallup’s companion analysis of its 2023 World Poll data makes the same point from the other direction: connectedness and loneliness, it found, are not simple inverses of one another. A person can have several social ties and still report loneliness; a person with few ties does not automatically report it. The overall 2023 Gallup and Meta survey found 72% of people worldwide reported feeling very or fairly socially connected – a large majority – which sits uncomfortably next to a simultaneous finding that close to a quarter report loneliness. Both figures are true at once because they are measuring different things.

What might explain the age gradient

None of the sources reviewed here establish a causal mechanism for why loneliness runs higher among the young, and this analysis does not attempt to supply one. What can be said is descriptive. Younger adults are at a life stage with more transitions – leaving school, changing cities, forming and dissolving early relationships – that repeatedly reset network stability even as raw contact frequency stays high. Cigna’s finding that lonely workers miss work roughly twice as often for illness and five times as often for stress suggests loneliness at this age is not a benign or transitional discomfort; it correlates with measurable functional cost.

It is also worth resisting the temptation to treat the age gradient as evidence for any single cause, including social media, remote work, or delayed adulthood, none of which is isolated as an explanatory variable in the age-stratified data reviewed here. The surveys establish the pattern; they do not establish why it holds.

The instrument problem underneath the pattern

Part of what makes this gradient hard to state cleanly is that the surveys producing it are not asking the same question. Gallup asks about feeling lonely “a lot of the day yesterday” or “very/fairly lonely” as a general state. AARP’s instrument is the 20-item UCLA Loneliness Scale, a validated psychometric tool rather than a single self-report item, applied only to adults 45 and older, which means there is no equivalent AARP figure for 25-year-olds to compare against Gallup’s. Harvard’s survey used its own item set. Cigna has used more than one loneliness index across its own report series. Comparing prevalence figures across these instruments the way news coverage often does – as though a 27% and a 61% figure are describing the same underlying quantity – overstates the precision of what is actually a rough directional agreement: young adults score higher than older adults on whichever instrument is used, even though the instruments would not agree on the exact share of any population that is lonely.

That directional agreement, replicated across at least four independently designed surveys spanning 2020 to 2026, is more persuasive than any single prevalence number. It is a pattern robust to measurement choice, which is a higher bar than most single-survey findings in this literature clear.

What would settle it more firmly

A study designed to test the age gradient directly would need to administer the same loneliness instrument to a nationally representative sample spanning all adult ages, in the same wave, with isolation measured separately using an objective network-size metric rather than self-report. That would allow a clean decomposition of how much of the age gradient in loneliness is explained by isolation versus by something else – comparison, transition frequency, expectation mismatch – that current cross-survey comparisons cannot isolate. Longitudinal tracking of the same cohorts as they age, rather than repeated cross-sections of different people at different ages, would also help distinguish a genuine age effect from a cohort effect specific to people currently in their twenties. None of the sources reviewed here does this at the scale required, which means the age gradient, however consistent, remains a well-replicated correlation rather than an explained one.