There were 215 fewer people in emergency accommodation in December 2018 than in the previous month, according to the latest figures from the Department of Housing.
There were 9,753 people in emergency accommodation last month, a drop of 215 from November.
Nationally there was a decrease of 111 families and 252 children, but the number of adults increased by 37.
Minister for Housing Eoghan Murphy said there usually is a drop in December, but there was a consistent drop in both the numbers of homeless families and new cases over a five month period in Dublin.
"This is showing us that increased outreach and prevention activity, such as HAP Placefinders, are starting to deliver results," he said.
He said the increase in the number of adults was due to the large number of new hostel beds.
The Dublin Regional Homeless Executive is delivering over 200 additional permanent beds and more than 150 temporary beds were also introduced as part of the cold weather initiative in Dublin.
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Children's charity Barnardos has said that while the figures show a "welcome decrease in family homelessness", 3,559 children spent Christmas without a home of their own.
In a statement following the publication of the monthly figures, the charity's head of advocacy said a decrease in child homeless in December is to be expected.
However, June Tinsley said "number of children homeless in December 2018 is 42% higher than December 2016."