The median age of those who have bought a home rose from 35 to 39 between 2010 and 2021.
Figures from the CSO also show the median income for those buying was €71,300 last year.
For those buying on their own, the age went up from 34 to 41 in the same period, while it went from 35 to 38 for joint purchasers.
CSO figures show the median income for those who bought a home in 2021 was €71,300 across the state, it was €46,000 for solo buyers and €87,700 for joint buyers.
The majority of home buyers bought a property in the region they were already living in, in the 11 years to 2021, nearly nine in ten property-buying individuals in Cork bought a place there.
Cork had the highest proportion, followed by Dublin.
Nearly one in four people who bought in County Donegal in the same period gave an address outside the state, most of those were Northern Ireland addresses, which was the largest proportion in Ireland.