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Loneliness in numbers

It is considered by many to be one of the largest public health challenges we face, these statistics describe why.

Loneliness is a part of life and something that most of us experience at some point. But when loneliness is severe or lasts a long time, it can have a negative impact on our health and well-being.


Recent studies suggest that long-term loneliness is one of the largest health concerns we face. It is as harmful as obesity or smoking 15 cigarettes a day. Feeling lonely can lead to depression, anxiety, disrupted sleep and stress. It can also be a factor in heart disease, increased blood pressure and degenerative brain diseases such as Alzheimer’s.

Long-term loneliness has serious health implications​

  • Loneliness is likely to increase your risk of death by 26%. [1]​​


  • Loneliness is worse for you than obesity. [2]

  • Loneliness is a risk factor for depression in later life. [3]


  • Loneliness and social isolation put individuals at greater risk of cognitive decline and dementia. [4]

  • Loneliness and social isolation have been linked to a 30% increase in the risk of having a stroke or coronary artery disease. [5] 


Loneliness affects people of all ages

  • 16-29-year-olds are twice as likely as those over 70s to experience loneliness [6]​

  • Characteristics of people who are more likely to experience loneliness include those who are widowed, those with poorer health and those with long-term illness or disability. [3]

  • In 2023, a survey from Nextdoor in partnership with Marmalade Trust revealed that 85% of UK adults had experienced loneliness in the last 12 months. Almost half (44%) felt chronically lonely. [4] 

  • Disconnected communities could be costing the UK economy £32 billion every year. [8]

  • The number of over-50s experiencing loneliness is set to reach two million by 2025/6. This compares to around 1.4 million in 2016/7 – a 49% increase in 10 years [9]

  • Half a million older people go at least five or six days a week without seeing or speaking to anyone at all [10]

  • Two fifths all older people (about 3.9 million) say the television is their main company [11].​


[1] Holt-Lunstad, 2015.

[2] Holt-Lunstad, 2010.

[3] Courtin, E., & Knapp, M. (2017). Social isolation, loneliness and health in old age: a scoping review. Health & social care in the community, 25(3), 799-812

[4] Cacioppo, J.T. and Cacioppo, S., 2014. Older adults reporting social isolation or loneliness show poorer cognitive function 4 years later. Evidence-based nursing, 17(2), pp.59-60.


[6] (Community Life Survey 2019-20) 

[7] Nextdoor, Marmalade Trust. "The silent epidemic". (2023)

[8] Research commissioned by Eden Project initiative The Big Lunch - 

[9] Age UK 2018, All The Lonely People

[10] Age UK 2016, No-one should have no one

[11] Age, U.K., 2014. Evidence Review: Loneliness in Later Life. London: Age UK

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