The Loneliest Age Group Is Not Who Most Policy Assumes

Gallup’s 2023 global survey found that 27% of adults aged 19 to 29 reported feeling lonely a lot of the previous day, compared with 17% of adults 65 and older. That is the lowest loneliness rate of any age band Gallup measured, not the highest. It sits awkwardly next to a decade of policy attention that has treated loneliness chiefly as an older-adult problem: the National Academies’ 2020 consensus report on isolation in older adults, AARP’s recurring surveys of adults 45 and up, the clinical push toward screening elderly patients for social disconnection.

The pattern is not a fluke of one survey. Harvard’s Making Caring Common project found in 2021 that 61% of young adults aged 18 to 25 reported serious loneliness, against far lower rates in older cohorts. Cigna’s 2025 report found Gen Z and Millennial respondents lonelier than Gen X and Baby Boomer respondents, despite the younger groups having grown up with far more constant digital connectivity. A 2026 eight-country study out of Washington University in St. Louis found loneliness in nearly half of young adult respondents, with the loneliness-depression-anxiety association holding after controlling for demographics and prior diagnosis. Four different instruments, four different countries or country sets, one consistent age pattern: younger, not older.

So why does the policy architecture point the other way

The answer is not that one set of studies is wrong. It is that “loneliness” and “isolation” are being measured, and the older-adult framework was built primarily on the second.

The National Academies’ 2020 report on older adults leads with a structural figure: roughly one quarter of Americans 65 and older are socially isolated, meaning they have objectively small or infrequent-contact networks, not that they report feeling lonely. Isolation is a property of a network — its size, density, and contact frequency. Loneliness is a subjective state, the gap a person feels between the connection they want and the connection they have. The two are correlated but distinct, and a 2024 study in Scientific Reports focused specifically on how that relationship shifts with age found the interplay between them is not constant across the lifespan. An older adult can have a small network and not feel lonely inside it. A young adult can have hundreds of contacts and feel acutely alone.

Much of the public health case for older-adult attention rests on isolation, which is real, measurable, and consequential for physical health independent of how it feels subjectively. Much of the case that young adults are in genuine distress rests on loneliness, the felt state, which multiple surveys now place higher in that group than in any other. Both things are true. They are not the same claim, and treating them as interchangeable is what makes the finding look contradictory when it is not.

The instruments do not agree with each other either

AARP’s 2018 survey of adults 45 and older found that one in three respondents were lonely, using the 20-item UCLA Loneliness Scale — a genuine strength, since it makes the figure comparable to the broader academic literature rather than a bespoke measure. Its 2025 follow-up, using the same instrument, found loneliness rising further in that population over the intervening years. That is a legitimate and comparable trend line, and it says the older-adult picture is deteriorating on its own terms.

But Gallup’s headline figures use a single-item measure — feeling lonely “a lot” of the previous day — which behaves differently from a 20-item scale summed over a longer recall window. Harvard’s “serious loneliness” category is a third construction again. None of these are wrong. They are answering different questions, and stacking their percentages against each other, as coverage of this topic routinely does, produces false precision. What survives across all of them is the ordering: young adults consistently near the top, older adults consistently lower, regardless of which instrument is used. The ordering is more trustworthy than the raw numbers.

What this does not settle

None of the surveys cited here are longitudinal in a way that separates a cohort effect from an age effect. It is possible that today’s young adults are unusually lonely because of something specific to this period — the aftermath of pandemic-era disruption to early adult milestones, a genuine change in how people in their twenties socialize — and that they will loosen in the ordinary way people historically have as they build families, careers, and settled friend groups. It is equally possible that a genuinely new pattern of disconnection in adolescence and early adulthood, described elsewhere in the literature around social media use and the displacement of in-person contact, produces a cohort that stays lonelier across its lifespan than the cohorts before it. Cross-sectional comparisons across age groups at a single point in time cannot distinguish those two stories, and nothing in the sources above does.

A study designed to settle this would need to track the same individuals across at least one full decade, using a single consistent instrument, with enough sample size to hold age, cohort, and calendar year apart from one another statistically. Absent that, the honest reading of the current evidence is narrower than either the “loneliness epidemic among elders” framing or the “young people are uniquely broken” framing: at this moment, on these measures, young adults report more loneliness than older adults do, older adults face more structural isolation than younger adults do, and a policy apparatus built mostly to address the second has not caught up with what the surveys say about the first.