Nearly half a million adults are living at home with their parents.
The latest census figures show almost 6 in 10 of those are men while 189,000 are women. A total of 458,874 people over 18 were living with their parents in 2016, an increase of 4.4%.
Less than half of those living at home were in work, while over 66,500 were unemployed and 152,269 were students.
The latest batch of stats from the CSO also revealed women in Ireland are more likely to be married than single by the age of 33, while and for men it's 35.
The number of married people is up 5 percent in five years, and they now make up 48% of the population.
There were 9% more separated and divorced people in 2016 than there were when the last census was taken in 2011.
Just over 1.5 million people are single and they account for 41% of our population.
Meanwhile the number of families in the state is up 51 percent in twenty years but family sizes are down.
More men than women live with their parents and almost 400-thousand people live alone.