Almost 12,000 people got support from the homeless and addiction charity Merchants Quay last year.
The figures are contained in its annual report for 2019 and show that the charity helped 11,600 people dealing with addiction or homelessness that year.
There were also 433 people given support for mental health issues which is an 11% increase on 2018.
It also provided emergency shelter and healthcare services like GP visits, dentists and counsellors to more almost 3,700 people.
CEO Paula Byrne said the circumstances for many of those who are seeking treatment have got worse due to the impact of COVID-19:
She said: "We're seeing a lot of people with increased anxiety, depression and obviously their mental health illnesses have been exacerbated by COVID."
Jack, who works in the needle exchange section of the facility, added that there are so many knock effects from the current restrictions.
He said: "At the moment, it's quite limited in what can we do compared to where it was.
"We would have 50 or 60 people coming in at any given time for the drop in and not having that service is a big loss for homeless people."
Merchants Quay Ireland is urging the Government to prioritise investment in its mental health services.
Reporting by Josh Crosbie
