The number of people in emergency accommodation increased by more than 100 people in October.
The latest homeless figures released by the Department of Housing show there were 10,514 people in emergency accommodation in October - 6,688 adults and 3,826 children.
While the figures show a decrease in the number of homeless families and children, there was still an overall increase of 117 people compared to September.
It means an extra 164 adults entered the system in October.
Housing Minister Eoghan Murphy suggests the "increase was expected" as extra emergency beds were recently introduced.
Meanwhile, the department today also released details of its latest official rough sleeper count, which was carried out on the night of 26/27th November.
92 people were confirmed as sleeping rough across the Dublin region - down 41% compared to last winter's figure.
Commenting on the figures, Minister Murphy said: "Today we see that those sleeping rough is at its lowest level since 2015 and the lowest since Rebuilding Ireland began.
"In October, there was a decrease of 23 families and 47 children in emergency accommodation and an overall increase of 117, which was expected following the introduction of new emergency beds in the Dublin region recently.
"It is also worth noting that the number of families presenting to homeless services in the Dublin region decreased in October."
A quarterly report released by the Government this evening also suggests "a total of 1,564 adults and their dependents exited homelessness into tenancies" in the third quarter.
The release of the latest figures comes only hours before the Housing Minister faces a confidence motion in the Dáil - with the Government expecting the minister to survive due to the support of some independent TDs.
A number of housing charities expressed their concern over the figures.
Focus Ireland said the number of people in homelessness has increased by 55% since the last general election in early 2016.
The charity's CEO Pat Dennigan said: “There’s now over 10,500 people homeless and it is heart breaking to see nearly 4,000 of these are children.
"Many of these families had their own home last year and will now be spending Christmas with their children stuck in a cramped hotel room or other emergency accommodation. Many others are facing a second or third Christmas without a home.
"Hotel rooms – and homeless hubs - are no places for children to be growing up. This is wrong and it must end.”
The Simon Communities, meanwhile, said urgent action is needed as winter sets in.
Spokesperson Wayne Stanley said: "At this stage, the Government must seriously look at revising the targets for social housing included in the Rebuilding Ireland programme, and act to improve levels of availability of suitable and secure accommodation for those currently experiencing homelessness.
“As we face into Christmas, we must not allow ourselves to become immune to the continuing worsening of the housing and homelessness crisis.
"We need to remember that this homelessness and housing crisis is not a normal situation, and should not be seen as acceptable on any level.”