How Does Living Alone Impact Health and Longevity, Particularly for Those Who Live Past 90?
Living alone is becoming increasingly common as people grow older. But does having a home to yourself affect how long you live?
The answer is more complicated than simply saying that living alone is unhealthy. Living alone is not the same as being lonely or socially isolated. Some older adults live alone while maintaining strong friendships, active social lives, and regular contact with family. Others may have people around them but still experience profound loneliness.
Research suggests that the quality and strength of a person's social connections may matter more than their household arrangement alone.
Living Alone May Be Linked to Higher Health Risks
Several studies have found an association between living alone and increased mortality among older adults. For example, a longitudinal study of nearly 4,900 adults in England found that people living alone had about a 20% higher mortality risk after researchers adjusted for socioeconomic factors, health, behaviors, mobility, and loneliness. However, the researchers emphasized that the relationship is complicated and that the reason someone lives alone matters.
People who began living alone following widowhood or divorce appeared particularly vulnerable. Depression, reduced mobility, and loneliness explained part of the association.
This suggests that the health effects may not come from having an empty home itself. Instead, living alone can sometimes accompany major life changes, reduced social contact, poorer health, or fewer sources of practical support.
What Happens to People Who Live Beyond 90?
Reaching age 90 or beyond is already a sign of exceptional longevity, but researchers are particularly interested in what distinguishes people who reach very advanced ages.
A recent systematic review and meta-analysis of 23 studies involving nonagenarians, centenarians, and other exceptionally old adults found that preserved cognitive function, independence in daily activities, stronger handgrip strength, and healthier lifestyle factors were associated with better survival. (PubMed)
Interestingly, research specifically examining people who eventually became centenarians has found that greater social isolation—including living alone, having limited family contact, and low participation in social activities—was associated with a lower likelihood of reaching 100. The association remained after researchers accounted for several health and lifestyle factors.
That doesn't mean a person who lives alone cannot reach 90, 100, or beyond. Rather, it suggests that maintaining meaningful social connections may be an important part of healthy aging.
Living Alone Isn't Necessarily the Problem
It is important not to confuse solitude with social isolation.
Some older adults deliberately choose to live alone because they enjoy independence and privacy. They may regularly meet friends, exercise, volunteer, attend community activities, communicate with relatives, or participate in hobbies.
In fact, one study of more than 7,900 older adults found that those living alone had a lower risk of all-cause mortality than those living with family after statistical matching. This highlights how complicated the relationship between living arrangements and longevity can be.
In other words, living with other people does not automatically guarantee better health, and living alone does not automatically shorten life.
The Bigger Concern: Social Isolation
Social isolation means having relatively few social relationships or interactions. Loneliness, meanwhile, refers to feeling that your social relationships are insufficient.
Both can occur independently of living arrangements.
An older adult living alone may have a rich social network and rarely feel lonely. Conversely, someone living with relatives may feel isolated or disconnected.
A large 2025 meta-analysis found that loneliness, social isolation, and living alone were each associated with mortality risk in older adults, although the relationships differed among the three factors.
Why Social Connection May Matter for Longevity
Regular social interaction can encourage behaviors that support healthy aging. Friends and family may encourage an older person to:
Stay physically active
Eat regular, nutritious meals
Attend medical appointments
Take medications appropriately
Maintain hobbies and routines
Seek help when feeling unwell
Stay mentally engaged
Remain connected to their community
Social relationships may also provide emotional support during stressful events such as illness, bereavement, or major life changes.
How Older Adults Living Alone Can Protect Their Health
Living alone does not mean giving up independence. Instead, older adults can build a safety net around that independence.
Regular phone or video calls, community groups, exercise classes, volunteering, religious or cultural activities, hobbies, and regular visits with friends or relatives can all help maintain social connection.
It is also useful to have someone who can check in regularly, particularly if mobility or health problems develop.
The Bottom Line
Living alone is not necessarily harmful to longevity. What appears to matter more is whether an older person remains socially connected, physically capable, mentally engaged, and independent.
For people who live beyond 90, maintaining cognitive function, physical strength, independence, and healthy lifestyle habits appears particularly important. Social connection may be another valuable piece of the longevity puzzle.
So the goal of healthy aging isn't necessarily to make sure an older person never lives alone. It is to make sure that living alone never means living without support, purpose, activity, or meaningful relationships.
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