Almost 10,500 people were homeless in June, an increase of 1.6% on May's figures.
Almost 1,400 families were recorded as homeless, including 3,071 children.
A statement from the Department of Housing says the continued increases are a serious cause for concern for the Government.
Minister Darragh O'Brien says the Government, local authorities and those in NGO sectors are making every effort to reduce homelessness.
He says: "Key to this is the delivery of new social housing and boosting overall supply.
"The Government is investing significantly in social and affordable housing, with a record €4bn allocated for current and capital investment in housing this year alone.
"Funding is in place to deliver 10,500 social homes, including 9,000 new build homes, building on the progress made last year when 9,183 new social homes were provided, a 17% increase on 2020."
