Why Young Adults Report More Loneliness Than Their Grandparents

Gallup’s 2023 survey of 142 countries found 27% of adults aged 19 to 29 report feeling very or fairly lonely, against 17% of adults 65 and older. That ten-point gap is not an artifact of one poll. Harvard’s Making Caring Common survey found 61% of Americans aged 18 to 25 reporting serious loneliness in 2020-21, against far lower rates among older cohorts. Cigna’s 2025 report found Gen Z and Millennials reporting more loneliness than Gen X and Baby Boomers, despite what the report calls greater technological connectedness. A February 2026 eight-country study out of Washington University found nearly half of young adults reporting loneliness, with the loneliness-depression-anxiety association holding after adjusting for demographics and prior diagnoses.

The direction of the finding is consistent enough, across enough instruments and enough countries, to treat as established: younger adults report more loneliness than older ones. This inverts the intuition many people carry into the subject, which assumes isolation is chiefly a problem of the widowed and homebound. It is not. The National Academies’ 2020 consensus report put the isolation rate among adults 65 and older at roughly one in four — a serious figure, but a lower loneliness rate than young adults report on nearly every instrument that measures both groups.

What the literature does not agree on is why. Four explanations recur, and they are not mutually exclusive, but they carry very different policy implications.

The phone-based-childhood explanation

Jonathan Haidt’s 2024 book argues that the shift from play-based to phone-based childhood, beginning roughly in the early 2010s, produced a cohort that reached adulthood with less practice at unsupervised, unstructured, in-person social contact — and that this shows up as elevated anxiety, depression, and loneliness specifically in the generation that grew up with smartphones and social media from adolescence. The collaborative evidence review that Haidt maintains with Jean Twenge compiles studies supporting this, but explicitly includes dissenting evidence, and several researchers dispute the strength of the causal claim rather than the existence of the correlation. The honest summary is that the timing lines up suggestively and the causal mechanism remains contested.

The declining-social-capital explanation

A second explanation predates smartphones entirely. The American Enterprise Institute’s 2021 survey found 12% of Americans report having no close friends, up from 3% in 1990, with the share of men reporting six or more close friends falling from 55% to 27% over the same period. If close-friendship networks have been thinning for three decades, younger adults may simply be the first cohort to reach adulthood without ever having built the friendship density that older cohorts accumulated earlier in life, before the thinning began. This explanation locates the cause in institutions and habits, not devices, and Axios reporting from July 2026 lends it support: Americans overall spent about 35 minutes a day socializing face-to-face in 2024, down from 45 minutes twenty years earlier, with the steepest decline — from roughly an hour to 35 minutes — concentrated in the 15-to-24 age group.

The labor-market explanation

A third strand points to work. Science published a 2026 study finding that remote work increases time spent alone and worsens mental well-being, and that the rise of remote work explains roughly a third of the increase in isolation and mental distress measured between 2011-2019 and 2022-2024. Remote workers who live alone saw increases in solitary time roughly ten times larger than workers living with others. Younger adults are overrepresented among remote and hybrid workers relative to older cohorts closer to retirement, which makes this a plausible partial explanation for the age gradient — though the study speaks to isolation and distress broadly, not to loneliness in young adults specifically.

The substitution explanation

The fourth explanation concerns what young adults do instead of meeting in person. A 2026 study in an Oregon State University-affiliated research release found that connecting with strangers online is linked to greater loneliness among adults 30 to 70, while connecting online with people already known was linked to neither more nor less loneliness — a null result worth taking seriously rather than smoothing over. A separate nationally representative study examined whether the closeness of online contacts moderates loneliness, addressing the same distinction from another angle. And a twelve-month longitudinal study across four Western countries, published in 2026, found that increased use of AI companion chatbots predicted increased loneliness over time — a finding that matters because it is bidirectional: lonely people turn to chatbots, and chatbot use appears to deepen the loneliness that prompted it in the first place.

What the gap between explanations obscures

None of these four explanations is disqualifying of the others, and none has been tested against the others in a design capable of apportioning cause. That is the real gap in this literature. Every study cited here measures a correlation between one candidate cause and loneliness within one age band; none of them holds the other three candidates constant while manipulating the fourth. Holt-Lunstad’s 2015 meta-analysis established that social deficits predict mortality more strongly in samples under 65 than over — a finding that raises the stakes on getting the cause right, since intervening on the wrong lever wastes a narrower window than commonly assumed.

A study capable of adjudicating between these explanations would need panel data following the same young adults across the transition into remote or in-person work, with baseline measures of smartphone use in adolescence, friendship-network size, and online-versus-in-person time use, tracked longitudinally rather than compared across cross-sectional snapshots taken years apart. That study does not yet exist. Until it does, the age gradient itself — robust across Gallup, Harvard, Cigna, and the eight-country study — is more solidly established than any account of what produces it.