The number of children in emergency accommodation increased by 67% in June compared to the same month last year.
According to the Department of the Environment there were 2,206 children in homelessness last month, compared to 1,318 in June 2015.
The number of adults in homelessness also increased by 27% since last year.
Last month there were 4,152 adults in homelessness, compared to 3,258 in June 2015.
Meanwhile, the Government has officially launched its housing and homelessness plan entitled 'Rebuilding Ireland'.
The plan aims to provide 47,000 new social housing units over the next six years, as well as target an annual overall build of 25,000 units per year.