The science of connection
Loneliness and connection: the numbers (2026)
Nearly half of US adults say they feel lonely on a typical day (47%, 2026 survey of 2,000 adults), the share of American men with no close friends rose from 3% to 15% between 1990 and 2021, and about half of an adult's close network is replaced every seven years. Nine in ten people have lost touch with someone they still care about, yet when given the chance only about a third send a message. Every figure below links to its original study.
This page is updated as new studies come out. Each number links to where it comes from; when a figure is taken from a press release or news summary rather than the paper, the note says so. We will add Kinroot’s own anonymous, aggregate numbers from the drift check once there are enough of them to mean something.
How many people feel lonely or disconnected
| Figure | Detail | Source |
|---|---|---|
| 47% | US adults who feel lonely on a typical day | Talkspace / Talker Research, 2026, n = 2,000 |
| 34% | Feel less socially connected than five years ago | same survey |
| 68% | Say they struggle to build in-person connections | same survey |
| 38% | Went “no contact” with a friend or family member in the past year (Gen Z 60%, Millennials 50%, Gen X 38%, Boomers 20%) | same survey |
| 59% | Of those who cut someone off, still not back in touch | same survey |
| 15 cigarettes a day | The Surgeon General’s comparison for the mortality impact of lacking social connection | US Surgeon General advisory, 2023 |
How many close friends people have
| Figure | Detail | Source |
|---|---|---|
| 55% → 27% | American men with six or more close friends, 1990 vs 2021 | Survey Center on American Life, 2021 |
| 3% → 15% | American men with no close friends, 1990 vs 2021 | same report |
| ~5 | Size of the inner circle that receives most of our attention in studies of social networks (Dunbar’s layers) | Saramäki et al., PNAS 2014 |
How fast friendships turn over
| Figure | Detail | Source |
|---|---|---|
| 48% | Share of a person’s close network still present seven years later; network size unchanged | Mollenhorst, 2009, n = 1,007 / 604 re-interviewed |
| 30% | Share of “discussion partners and practical helpers” still in the same role after seven years | same study |
| “One in, one out” | Stable pattern over 18 months: new contacts take the calls of old ones rather than adding to them | Saramäki et al., PNAS 2014, n = 24 |
| ~93% | Share of in-person time with parents already used by the end of high school, for a typical person who then lives apart from them | Tim Urban, The Tail End, 2015 (essay, not a study) |
Why people do not reach out
| Figure | Detail | Source |
|---|---|---|
| 90% | Had lost touch with someone they still cared about | Aknin & Sandstrom, 2024, seven studies, n ≈ 2,500 (press release) |
| 70% | Were neutral or negative about reconnecting at that moment, despite warm feelings | same |
| 28–37% | Sent a message to a lost friend when given contact details, time and a draft space | same |
| +two-thirds | Increase in willingness to message an old friend after first messaging current friends | same |
| 5,900+ | Participants showing that recipients appreciate being reached out to more than senders expect, most for weak ties and unexpected contact | Liu, Rim, Min & Min, JPSP 2022 (APA press release) |
How to read these numbers
Three things stand out when you put them side by side. Loneliness is common, not marginal. Friendship loss is structural, a schedule effect rather than a character flaw, and it is steepest for men. And the fix is cheaper than it feels: the main barrier to reconnecting is a prediction about the other person that the data says is wrong.
The drift check
Name up to five people, answer two questions each, and see who is quietly drifting.
Questions people also ask
How many people are lonely?
In a 2026 survey of 2,000 US adults, 47% said they feel lonely on a typical day and 34% feel less socially connected than five years ago. The US Surgeon General's 2023 advisory called loneliness and isolation an epidemic, with health effects it compares to smoking up to 15 cigarettes a day.
How quickly do friendships fade?
Faster than people expect. In a seven-year Dutch panel, only 48% of the people in someone's close network were still there at the end, while the network stayed the same size. An Oxford phone-record study found a stable 'one in, one out' pattern: new contacts replace old ones rather than adding to them.
Why don't people reach out to old friends?
Fear that the friend will not want to hear from them, worry about awkwardness, and guilt. In seven studies with about 2,500 people, only 28–37% sent a message to a lost friend even when given everything they needed. Separately, more than 5,900 participants in the Reaching Out studies showed recipients appreciate unexpected contact far more than senders predict.
How many close friends do people have?
The Survey Center on American Life found the share of American men with six or more close friends fell from 55% (1990) to 27% (2021). Research on social networks keeps finding an inner circle of about five people who receive most of our attention.
Can I cite these numbers?
Yes, but cite the original study, which is linked beside every figure, not this page. Where a figure comes from a press release rather than the paper itself, the note says so.
Sources
- Talkspace / Talker Research (2026), survey of 2,000 US adults
- US Surgeon General (2023), Our Epidemic of Loneliness and Isolation
- Survey Center on American Life (2021), The State of American Friendship
- Mollenhorst (2009), Where friends are made, NWO
- Saramäki et al. (2014), Persistence of social signatures in human communication, PNAS
- Aknin & Sandstrom (2024), Communications Psychology
- Liu, Rim, Min & Min (2022), The Surprise of Reaching Out, JPSP
- Tim Urban (2015), The Tail End
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