Ninety-five homeless people died in Dublin last year, according to freedom of information figures released to the Today FM newsroom.
Almost 400 have lost their lives in the past five years.
Of the 95 who died last year, 23 were in supported temporary accommodation.
Dr Austin O'Carroll, who works with homeless people in Dublin city, says there are several factors in homeless deaths.
“Poverty is associated with things like increased addiction - including alcohol addiction and in particular drug addiction.
“People often enter homelessness as a result of these and these things do cause earlier death.
“Now, what happens with homelessness is these issues can get exacerbated and the way they cause death is alcoholism can cause death through liver failure and drug addiction causes death mainly through overdoses - which is a significant cause of death among homeless people.”
He also says homeless people are more likely to be the victims of violence and car accidents, as they're more often on the streets.
Professor Bill Tormey, a consultant at Beaumont Hospital, says there are other factors also.
“Flu, COVID - all that sort of stuff - they would also kill people even though they go into hostels because they just pass it around among each other in hostels."
The number of homeless deaths in the capital last year is down from 115 in 2021 - but is significantly above the previous three years.